It's an interesting point made by a colleague of mine that has really stuck in my mind, plus something I've been aware of myself for a while.
A lot of people, in general are sick of the current way things are being done. There is very little PC about Donald Trump. I think overall people are being sick of being told what they are "allowed to think" and "allowed to say" because you might offend someone.
Trump is saying what a lot of people are thinking, right or wrong, and I believe this is why he has the traction he has. He isn't the only one using it, to some success.
Whilst I don't agree with everything in this article, the last little bit has really stuck with me.
"The principle of free speech can sometimes be used to defend the indefensible but it certainly shouldn't be curtailed to avoid hurting the feelings of over-sensitive people whose views are often as unreasonable and entrenched as those of the very people they despise. "