What do you suppose is causing the rise of the “far right”
It's tied to the rise of populism (popularism); which is also a rejection of elitism (expertism).
The Internet and cell phones are factors.
Everyone is a journalist, a photographer, and a researcher.
We the people have instant access to lots of information, most of which is useless writing Illini type bs.
People, intelligent people, are still pushing the 9/11 nonsense.
Rebellion against and distrust of traditional authority is part of it. That might be why anti-elitism/ populism is very popular, but right wing authority is not.
In Europe, traditional liberal democracy and social democracy are still highly valued. Less so here?
Xenophobia is a factor too, but not deeply rooted. Most people don't see immigrants as a problem in their own communities, but they see it as a macro-problem.