It's interesting that this probably one of the most pro-Clinton forums out there. It wasn't really that different during the primaries.
Well, there was also a whole lot of ironic Trump support at that point, which I'll admit, was well-executed by Lief and others.
A couple things:
1. Trump isn't a very good candidate. This is obvious.
2. Trump's strongest demographics - seniors, those without a college degree (and are not pursuing one), Evangelicals, veterans - are significantly underrepresented here. Add this to a very strong social liberal ethos (shared among many on both the left and right here), and it's no surprise why Trump is seen as anathema around here.