joker isn’t racist, he kills everyone
joker isn’t sexist, he thinks everyone that’s not him isn’t important
joker isn’t homophobic, he’s doesn’t like the batfamily in general, straight or gay or what have you
if the joker is a better person that you are, you need to reevaluate yourself
If I remember well, there’s a crossover where The Joker and Red Skull work together and when Mr J realizes RS is a nazi, he totally flips out!