(NKJV) Re.20:1 Then I saw an angel coming down from heaven, having the key to the bottomless pit and a great chain in his hand. 2 He laid hold of the dragon, that serpent of old, who is [the] Devil and Satan, and bound him for a thousand years; 3 and he cast him into the bottomless pit, and shut him up, and set a seal on him, so that he should deceive the nations no more till the thousand years were finished. But after these things he must be released for a little while.
"No more" as related to time (not yet), or degree (as before)?
Strong's G2089 - eti
Number of occurrences in the KJV; yet 51, more 22, any more 5, still 4, further 4, longer 3, misc 10.
(a) of time: still, yet, even now, (b) of degree: even, further, more, in addition.
If related to degree it would mean no more deceiving nations like he had before he was bound, but the OT has relatively little to say about Satan's actions. The word occurs in the KJV 19 times, 15 of those in Job, and in one of the other four - 1 Ch. 21:1 - it was God that was called Satan! Compare to 2 Sam. 24:1. Serpent occurs 32 times, 5 in the Genesis garden account, 4 times referring to snakes in Exodus, 3 references to the brass serpent Moses made, many of the rest seem metaphoric and a few prophetic. None of the 16 occurrences of adversary nor the 6 of dragon speak of Satan. Devil occurs 4 times referring to a demon to whom sacrifices were made.
In the NT Satan (G4567, satanas) occurs 36 times and in Re. 12 & 20 is equated with the serpent of old and the devil (G1228, diabolos) which occurs 38 times. G1139, daimonizomai refers to demons/demoniacs (as rendered by modern versions like NASB) which possessed many people causing physical or mental infirmities. All uses are in the four gospels, telling mostly of Jesus casting them out. G1140, daimonion is used similarly in the synoptic gospels. G1141, daimoniōdēs is used only 1 time in James 3:15 speaking of demonic wisdom. Here I'll focus only on G1228 and G4567 which designate the devil called Satan.
The first mention of the devil is his temptation of Jesus, ending when Jesus tells Satan to go. The links above show the devil called Satan tempting or entering people and various other acts in the record of the Gospels, but not deceiving nations. There are two occurrences of each word in Acts where the devil is called an oppressor and enemy of righteousness; and Satan's dominion is equated with darkness, and he caused Ananias to lie. In the epistles are many warnings to people and groups to beware of the devil's schemes, snares, etc. Also, are predictions of Satan's doom, warnings of his temptations, various actions but no deception of nations, nor even explicit account of deceiving persons. However, tempting and seducing them could be considered such and there seems to have been quite a lot of that during the transition period. Since we have record of many believers succumbing to that temptation and falling away, it seems safe to say much more so would unbelieving Jews throughout the inhabited earth (G3625, oikoumene, Re. 12:9) have been deceived and become pawns of Satan. From the time Jesus said, "Now is the judgment of this world; now the ruler of this world will be cast out" (Jn. 12:31) until that judgment was complete seems an unprecedented deception of people, so I believe Re. 20:3 related to time (i.e. not yet) as opposed to degree (no longer). The first mention of Satan deceiving nations is Re. 20:3,8, but I question whether "nations" was what John meant. A dozen translations agree Satan's deception would resume as before, but deception of "nations" as the word is commonly understood doesn't seem to match Satan's record, so let's consider another possibility.
(NKJV) Revelation 20:3 and he cast him into the bottomless pit, and shut him up, and set a seal on him, so that he should deceive the nations no more till the thousand years were finished. But after these things he must be released for a little while. ...7 Now when the thousand years have expired, Satan will be released from his prison 8 and will go out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to battle, whose number [is] as the sand of the sea.
This passage tells of a past time when the devil was bound, and speaks of his release in a future sense. This vision must be briefly adding details about the time before he was cast out for a short time in Re. 12 which John recorded there as a past event.
How are we to understand Satan deceiving the nations to gather them for the war? In the Old Testament it was God who caused nations to be instruments of His judgment. The same was true in the judgment of Jerusalem according to Re. 17:17 which says God put it into the hearts of the ten horns (kings) to fulfill His purpose, to be of one mind with the beast until God's words fulfilled.
Strong's definition for deceive (G4105) says; to cause to stray, to lead astray, lead aside from the right way, lead away from the truth or into error. Were there any first century nations practicing the right way, i.e. governing in a moral and truthful manner? Maybe those definitions are too limited, perhaps influence or cause would fit, but, we've already seen it was God who decreed the Roman coalition would carry out His judgment. Another possibility is that the word nations is in this case not the best translation of G1484, ethnos. Number of occurrences in the KJV; Gentiles 93, nation 64, heathen 5, people 2. Strong's definitions are:
1) a multitude (whether of men or of beasts) associated or living together
a) a company, troop, swarm
2) a multitude of individuals of the same nature or genus
a) the human family
3) a tribe, nation, people group
4) in the OT, foreign nations not worshipping the true God, pagans, Gentiles
5) Paul uses the term for Gentile Christians
Could it sometimes mean the Jewish tribes, or even more simply, people, as in people sharing a common cause. Mt. 21:43 and Acts 8:9 in the NASB and Acts 8:9 and Ro. 10:19 in the KJV do translate G1484 as "people." A few other verses come to mind where "people" would seem a better translation, e.g. Mt. 25:32 which relates the nations gathered and the sheep separated from the goats. Clearly the verses that follow speak not of nations, but of people gathered, those who were to be blessed for their actions, and those that were to be cursed for their inactions (Compare GWT judgment, Re 20:11f). Consider Jesus' command to teach and baptize nations in Mt. 28:19, did the disciples ever baptize a nation? In Re. 16:19 what does "cities of the nations fell" mean? No city of the Roman coalition fell, but cities of the Jewish people did. Would it make more sense if Re. 21:24 said people will walk by its light? Many nations today could use some healing, but is the main purpose of the tree of life in Re. 22:2 for healing nations, or people? A healed people will result in a healed nation.
There was indeed a people that were heavily influenced by Satan, those who were of their father the devil (John 8:44). After the Jewish polity rejected and crucified Jesus, their lot was doomed to deteriorate exponentially culminating with those rebellious zealots that resisted all authority, formed armies and began the Jewish revolt (which also caused the severe internal civil strife) that brought the Romans to quell it. Those rebels would certainly fit the definitions in red above.
Re. 13:1-4 tell of the beast from the sea that received his power from the dragon. That surely had to have been Nero who epitomized evil. As for those since - Hitler for instance - whose evil seemed to exceed Nero's, it's only because they had better technology with which to commit their atrocities. Then in 13:11-17 we see the beast from the earth (land) who spoke as a dragon and who exercises all the authority of the first beast, and who deceives those who dwell on the earth (land). J.S. Russell made a good argument here that this man-beast could have been Gessius Florus, the Roman procurator of Judea from AD 64-66 under Nero. He was succeeded by Marcus Antonius Julianus in 66, of whom the only historic info is mention by Josephus in Wars 6.4.3. At any rate, those deceived surely refers to the Jews in Judea and those scattered in neighboring areas. 19:20 reiterates the deception by the beast from the land (aka false prophet) of those who had received the mark of the beast and worshipped his image. If 20:3&8 used people instead of nations the reader would be directed back to those deceived mentioned in 19:20, and thus 13:14,16. See Wars 5.13.4,5,6 on the level of depravity the Jewish people had reached. Josephus closed paragraph 6 with:
... And here I cannot but speak my mind, and what the concern I am under dictates to me, and it is this: I suppose, that had the Romans made any longer delay in coming against these villains, that the city would either have been swallowed up by the ground opening upon them, or been overflowed by water, or else been destroyed by such thunder as the country of Sodom perished by, for it had brought forth a generation of men much more atheistical than were those that suffered such punishments; for by their madness it was that all the people came to be destroyed.
I don't read Greek, but sometimes comparing variant spellings can give a clue about the meaning in a particular verse, not however with the six variants of ethnos. Except for a couple places ἔθνος (ethnos), ἔθνει (ethnei), and ἔθνους (ethnous) are singular. The rest are mostly plural, but it seems completely arbitrary whether various translators render those variants Gentiles or nations. Perhaps futurist expectations have biased translators toward the more global sounding usage of "nations" in passages that speak of a past covenantal judgment. At any rate, the devil deceiving nations - specifically Rome's allies - to cause the war does not match the biblical or historical record. Lastly, the phrase "Gog and Magog" might seem to suggest external nations, but in light of all the above, it seems possible it was a metaphor for the length and breadth of the preceding phrase, "four corners of the earth (land)" from which the rebels and zealots were gathered. Or, since Sodom, Egypt, and Babylon were used as metaphors reflecting the depravity to which Jerusalem had sunk, perhaps the phrase was added to emphasize God was against Jerusalem and He was about to send fire upon her as He had on Gog and Magog of Eze. 39:1,6.
And He did, in the year of our Lord 70.