“The communists have infiltrated every aspect of American life. It needs to be destroyed. Period.”
The Nazi’s did the same thing. In Germany there were a lot a clubs and the Nazi’s infiltrated them such that it wasn’t safe to say anything anywhere.
You are apparently referring to the Nazi practice / policy of Gleichschaltung, but your description greatly understates how it was carried out.
Organizations (private associations, social clubs, and even college fraternities) were not "infiltrated;" rather, they were told:
"Here is Hans, your new president. We know that, before today, Hans never had anything to do with your organization, and still has no real understanding of your organization's purposes, goals, and traditions - but he's your new president. He reports directly to us. And you will do exactly what he says! Oh, and one more thing: You don't have any Jewish members, do you? Because we'd like to have a little talk with them, in private."
Regards,
And those sunsobitches would shoot you for not knowing how to use apostrophes!