first of all, you have one of the finest descriptions of the American reactionary mindset in that first paragraph that I've ever read, however

they are absolutely not receptive to Marxism or any form of class analysis beyond the normal sort of individual incoherence that the average American has.

You talk to them about fighting authority and organizing and they will instantaneously subvert it to be about some nebulous, non-bourgeoisie elite or just Jews. They're chuds precisely because they can't or won't identify class interests. Chuds are hostile to existing authority because they believe it is the incorrect authority. They don't like existing American authority because they believe it's full of Jews or it's too gay or that it's globalist. Even then, they'd only want to collectively mobilize in the goofy American consumerist way of boycotting or buying certain t-shirts.