Trump has an attitude and an approach to dealing with people who disagree with him. His (public) interpersonal style rubs me very much the wrong way. I understand the temptation to want to punch him, and it's not because of his politics. Nor is it because I am a generally violent angry person. It's because Trump is (in public) a bully, and I deeply resent that style of interaction.
Ok I'm starting to see this. I guess a good example is how he acted towards Jeb especially in the primary debates. I still think that responding to Trump's verbal style with physical violence is wrong.