I dunno if the way you put it is exactly true for the people here. I doubt (hope) that people here weren't enjoying seeing people get locked-up and beaten by cops.
But, this attitude of "I'll be supportive as long as they act like I think they should", or "keep it to themselves" is just a crock of shit... to me.
And, longing for the old days when blacks knew their place and white people could tell niggger jokes whenever they pleased, and not feel bad about it, is just tons of fun, I'm sure.
Personally, I don't believe Donald Trump is a racist in the same way as old, southern white racists are/were. He's just an asshole who gets off on being an asshole. So, he has that in common with them. But, I don't think he's a person who instinctively believes blacks are inferior to whites. But, people who do have hitched their wagon to him, and he'll gladly reward them with whatever he thinks they need to hear to keep them showing up at his rallies.