I'm sorry but how would his race have anything to do with the character's personality, back story, and all the other things that make that character that character.
If superman's suite was orange, green, and purple, would not superman still be superman? If the hulk transformed into an orange giant monster, wouldn't he still be the same super powerful beast he already is? If a rose had any other name would to still smell as sweet?
I don't really care if you are racist or not, but this whole question is pointless.
Nick Fury is Nick Fury whether he is white, black, green, or purple.
Marvel changer the ethnicity, because all there superheros were whitewashed. I don't really think people think that Marvel is racist.
"What's next? turning Mandarin into a Caucasian; Captain American into Latino; Black Widow into black....and other possible race swap??" <= see that is the line that makes me think that you are racist. What does the characters race have to with anything.