That's because they are painfully ignorant.
Maybe Reiner has never seen the “Gettysburg” movie (which is hard to believe).
Jeff Daniels’ speech to the mutineers who want to go home and not fight for the Union any more is always worth watching. Five minutes.
https://www.youtube.com/watch?v=uTZSwgnWtuA
Reiner is not ignorant. This commie knows precisely what he is doing.
Accordingly, I don’t call him meathead. I prefer the term “ballistic gelatin”.