“When the thousand years are ended, Satan will be released from his prison and will come out to deceive the nations that are at the four corners of the earth, Gog and Magog, to gather them for battle; their number is like the sand of the sea. And they marched up over the broad plain of the earth and surrounded the camp of the saints and the beloved city.”
Progressives want to tear apart society, ostensibly in order to build a better one, though they can’t tell us how they plan to do that. But they are convinced the existing system is unreformably corrupt, and that oppressed humanity will prosper under a different and better one.
Postmillennialists believe much the same thing, really.