Back to the topic though, I really don’t understand why people are apologist or have blinders on for Trump. They’ve decided they like the man, and it therefore makes him infallible.
I’ve said it before, but it’s results. For some people, if he delivers the results they want, everything else can be forgiven. While certainly there are some that are so blinded that they actually think Trump is a wonderful human being, many more of them think he is fairly awful but tax cuts, or fairly awful but Gorsuch, or fairly awful but white power. Yes, I’m certain there are even a few Nazis who shake their heads and say “I know we’re all ultimately just about murdering people, but couldn’t we have come up with a better spokesperson?”
But to get to the point of “what does it take for people to see how bad he is?” the answer at some point is nothing. Trump’s shooting a guy on 5th Avenue comment was accurate. Some of his supporters would just say yeah he shot a guy but tax cuts, or he shot a guy but Gorsuch, or he shot a guy but white power. Some may peel off if there’s publicly-available ironclad indisputable direct physical evidence that Trump committed treason and then ate a baby afterward, but I doubt even in that case he’d go under 36% support.