I don't think the problem is him not being politically correct. I'd say he was not being politically correct when he said that illegal aliens are a crime problem. That's something that offends the "politically correct" but it's a legitimate point of debate.
My problem with trump is that he is constantly engaging in ad hominem attacks on people who disagree with him. Constantly responding with personal attacks instead or actual substantive rebuttal.
Like I didn't see the debate but my wife told me about a part where Chris Wallace asked him what evidence he had that the Mexican government is sending problem people over the border. She said he never answered the question. Just started on a rant about how stupid people in Washington are.
It wasn't the "blood coming out" comment that to me showed typical Trump behavior, instead, it's when he said this:
I don't have a lot of respect for Meghan Kelly. She's a lightweight. And, you know, she came out there reading her little script and trying to, uh, you know be tough and be sharp and, uh, when you meet her you realize she's not very tough and she's not very sharp. She's zippo.
You listen to him and he rarely if ever has any substantive rebuttal to anything. He's almost all ad hominem attack. Just low ball personal attacks on people who challenge or disagree with him.
I've dealt with people who use that approach and it's pretty damned vacant. Unfortunately there are many people who are taken in by it. Like my wife said when he just went on a rant about how stupid people in Washington are instead of answering the question about evidence for what he said a bunch of people cheered.