There's another element of class that's been talked about, and I think there's some validity to it as affecting Trump. I think it focuses largely around education, but also includes what a lot of people actually think of as "class".
For some people, who tend to be more educated than average, there are certain rules of how you are supposed to conduct yourself in public. Things you do/don't say, etc.. And it also includes a certain expectation that people in leadership positions are going to speak in a more educated, sophisticated manner. Not like a politician, but like someone who is educated and sophisticated. It's the difference between how a good executive might speak versus how a good foreman will speak. Neither is right or wrong, but different tones work best in different situations, and when speaking to different audiences. And I'm not saying that being educated/sophisticated implies softness. Churchill was hard as granite, but had an incredible command of the language.
I think a lot of what Trump says hits people at a pretty visceral level. My job and other parts of my background have made me be able to communicate in either fashion, but when it comes to leadership, I just lean on a gut level to someone who has command of the language and expresses themselves well. That's a bias, and it may be an unfair one, but it exists. I don't even know if it is right to try to overcome it, or not.