Don't forget that libs are very wonky and like to read thick books and feel smart. This shit is like catnip to them.
I have a friend who, when we met, he had several Rush Limbaugh books. He ditched those quickly, but then kind of floated in liberal territory for awhile. I got him on Zinn, then Parenti, and now he's sending me shit on ending capitalism completely unprompted. Don't discount pipelining.
I want to make a big ass study about people who radicalized studying their previous profile, what made them enter this rabbit hole and how it started/progressed to answer that exact question, what twitter/facebook/reddit connections they made, etc. But I study gene expression.