Not OP but:
It’s not about what’s causing this but what caused this… a long time ago:
Decades of brain-washing left them brain-damaged with a hatred for everything “left” (as in USSR-style left) but totally susceptible to any form of propaganda and populism.
Russians becoming nazis, Eastern Europeans being either pro-Russian (USSR-nostalgic) relics or crazy nationalists and supporting every right-wing populist and Ex-GDR citizens cheering for the AfD. It’s all the same damage.