If you'll recall, many of the same people who voted for Trump despised him for his character flaws when he was a Democrat, pre-2015 and pre-birtherism, which again suggests there are more than enough apolitical reasons not to like him. People seem to forget this, but maybe I'm the elder statesman around here.
That aside, why wouldn't "reasonable" do the heavy lifting, and how is that a problem? Should we come to some other conclusion about the people that voted for him? Aren't we then forced to say these reasonable people just didn't know any better due to ignorance or lack of education? Somehow, that doesn't seem like an improvement. I'm okay with saying these are unreasonable people as well.