"New Atheism" was more about people being afraid of terrorists (and to a lesser extent, fundamentalist evangelicals) than rational thinking. It was nothing more than the way a lot of liberals processed 9/11. That explains how they could admire someone like Christopher Hitchens so much. It'd also explain why so many of them became Trump supporters.
If you talked about things like epistemology, ontology, or ethics with them, often the eyes would just glaze over.
I sometimes give people too much credit.
Also, I'm not complaining about atheism. I'm complaining about an annoying evangelistic form of atheism that was popular (especially on internet spaces) for parts of the last two decades. I think it officially died in 2015. I suppose it was a combination of Trump and that Charlie Hebdo thing.
I can see how in that climate, at that time, Trump might look attractive to some people (if not me) since he's not "churchy" like W (even though evangelicals love him anyway, but again, I just don't understand right wing values).
If you haven't thought about your value system or philosophical outlook on any deeper level than whether or not you believe in the Bible, the foundation of your value system and philosophical outlook is probably not particularly strong, and you can easily be swayed by charismatic leaders who make you feel good. Also, it was annoying that our political climate was such that you had to pick either "kick out all the refugees from the dumbass war we started" or "hmmm.... maybe criticizing religion shouldn't be allowed if it upsets people enough to want to kill", so that might probably made people feel alienated and perhaps want to realign.