Here is yet another article about Trump, and him saying offensive things, part 3939, to wit A Deal Breaker for Trump’s Supporters? Nope. Not This Time, Either.
Trump not apologizing for anything IS what people like about him – it doesn’t matter what he’s actually said, it’s the way he says it and defends it they actually like. It’s the medium, not the message, much the same way the Democrats never minded Obama continuing Bush’s wars, NSA surveillance, or an official, not euphemistically named “Kill List”. The more offensive, the more “courageous” it seems (courageous being something that prompts criticism, which is courageous by the standards of neurotic modern times, not in any actual sense). If you’re a groupish person you are quite loath to criticize your “champion” (in the original sense of the word), and by and large you’ll come up with reasons for the behavior rather than condemn it.