I think I see your point. IF America is great, people ought to like it!
Not everyone has the same idea of how to make America great again. Also, many of us think it HAS been great until Trump's presidency!
So those of us that feel that way think the best way to make America great, or keep it great, is to stop Trump from damaging it. But those that think Trump is wonderful will see things exactly the opposite. They think that it is 'liberals' that need to leave.
I think that if someone SINCERELY thinks he or she is doing the right thing for America, they should be treated with respect, whether or not you agree with them. Since I don't think Trump is at all sincere, but rather just panders to his base, I don't give him much respect at all.
I do think AOC is sincere. I think she might be a little over idealistic, and has made some mistakes, but I think Trump should recognize that sincerity and treat her with respect.