"He's not politically correct."
I think this is important. Among the many problems with PC is this:
When you exclude an idea from discussion, you don't eliminate that idea. You drive it underground into an echo chamber where it gathers strength and resurfaces later.
Censorship -- even of a soft de-facto variety -- creates the impression that your position is weak. The censored idea starts to develop the mystique of a forbidden truth. You can see this very obviously in the whole "red pill" thing. In the original Matrix film, the red pill was a metaphor for forbidden knowledge.
An analogy would be to the war on drugs. Forbidding drugs makes them alluring and cool and creates a drug subculture. Forbidding discussion of nationalism, race, and gender has made race nationalism and gender determinism into forbidden, cool ideas that mark one as a holder of privileged secret knowledge.
On another note:
I know a number of Trump supporters. Here's what I have heard:
(1) Economic concerns are an issue. One person said (paraphrasing) "He's against outsourcing. He could eat a baby on live TV and I'd vote for him. I'll vote for Satan if he'll do something about outsourcing."
(2) A lot of Trump supporters I know just hate the system and wanted to cast a "fuck you" vote. They don't love Trump per se but hope he'll do a lot of damage to the existing international financial and political order.
(3) A lot of people hate globalism, or at least globalism the way it's turned out. It's viewed as a path to corporate feudalism. These folks hope Trump will set back globalism and restore national sovereignty.
(4) Some people just hate the Clintons and blame them for the 2008 crisis (repeal of Glass-Steagal) etc., so they voted against Hillary more than for Trump. Some also hate the Clintons for taking the nomination from Bernie Sanders. I know a few Sanders voters who voted Trump.