It's the recasting of existing characters that has turned people off. A black kid as Spider-Man, a black girl as Iron Man. It's ridiculous. If they make original characters for different ethnic groups they are accepted just fine, like Black Panther. But it has to be an interesting character and have good writing to work.
Just so you know, Spiderman was fighting the Green Goblin through the multiverse and there were many Spidermans. Some were white, some black, some young, some old and some were even girls. The half black half Rican Spiderman was named Miles Morales and he was popular even in this universe. That's the kind of things you can do in comics.
You think black kids are only happy with a white hero? You think girls only look up to boys? You think there is no room for any black hero unless he has black in the name? You must have hated a black Green Lantern.
Then I remembered, why am I even commenting. Republicans have no imagination. If they didn't have laws telling them not to kill, they would be dropping gays off roofs. I never mentioned Northstar.