Importantly, most Trump voters explicitly try to appeal to blacks, insist they aren't racist, and argue from things like the Constitution, which just got disparaged as ineffectual and valueless because the left (jews, white shitlibs, etc) don't buy into it and try to subvert it. Pro-White racial identity politics have the same issue, that most people, not even most Trump voters, buy into them. It's still very much a no-no line that people aren't allowed to cross.