> Do you have anything specific and constructive to say about how to undermine that movement?
Yes. You rub their face in it.
Dignity is the Lynch pin in modern American politics. Everyone demands their own bit of it.
What a "conservative" thinks is dignified versus what a "liberal" thinks is dignified, is of zero consequence when you have actually spotted the totalitarian-authoritarian personality, in either case, or indeed .. in any case.
There is a backlog of rejected dignity in American politics. It starts with war crimes prosecutions, because the public are in very serious danger of letting their war criminals get away with it. Totalitarian-authoritarianism can be spotted by the war crimes, crimes against humanity, and violation of human rights at massive scale.
What the war criminals do to other nation states, they eventually do to their own. ICE is an extension of crimes against humanity already committed, and now refined for local application.
And both sides are doing it.
So, you just simply don't let either side get away with it.
War crimes are the exact opposite of human rights - a government committing war crimes on other states is denying the human rights of its citizens, also.
So, constructively, if you want to do something about all the "useful idiots" consider whether you might be an idiot, or totalitarian, or authoritarian, or none of the above - particularly when it comes to the crimes of the state from which you gain survival.
An easy way to express the solution is to demand that there be no more secret, or unknown, war crimes. In this you will make your own local change, and it'll infect others, too ..
Remember, the wars are the reason for all the local human rights abuses at home. If there weren't a fetid desire to bomb cultures considered inferior into oblivion, the local culture would be being attended to in equitable ways.
"Your streets are ruined because your state profits more from ruining (other nations') streets than building them (locally)."