Being Christian is pretty much a requirement for believing in "the anti-Christ"

You're wrong there in a certain way. I'm not Christian (in that I don't believe in the divinity of Jesus) but I do believe in the anti-Christ. That is I believe that some people who DO believe in the divinity of Jesus will follow one or more very bad people because they think he is Christ returned, and it will not turn out well in the end. You have to be irrational to believe a lot of their dogma to begin with, so believing some more is no great leap. And blind faith can lead to some very bad things.

I don't think Trump really qualifies, but we are seeing the same sort of phenomenon right now. A lot of people of faith have been taken in, despite all of his many moral defects.