"Other than that, you know, refusing to rent to black people is pretty racist."
No, no, no, no, no. You're confusing hate-motivation with good-business-decision motivation. At the time, which I believe was the early 70's, if you rent to blacks or even other minorities in your apartments or housing developments, the whites were scared and would move out of the apartments or sell their houses and move away, because of the reputation, deserved or not, of the blacks being more violent. Renting to blacks was a busines-stupid decision at the time.
Interesting that people have to reach waaaaay back to the early 70's for this lone "racist" example that is not really racism. Probably means he isn't doing it any more. Its about as valid as the charge that he is sexist, which ignores the fact that his campaign manager is the 1st woman to win a presidential campaign as campaign manager, and a woman was in charge of building his last skyscraper.
All of these leftist charges that Trump discriminates against group X, Y, are Z are lies. The only ones he's trying to discriminate against are criminals, and that includes the ones that break our laws to sneak into the country. But he wants to punish them because they broke our laws, not because they are brown. Its a legal issue, not a race issue.