Because as a Jew who always wanted to see Jewish characters, we get it. We don’t claim to be in the same position, because as a white guy, we could still see plenty of white guys to identify with or dream about being like, but we get it enough to want black kids or latino kids or gay kids to pick up a comic book and read stories about people like them.
Want to fight white nationalism in the 21st century? Just do what Sherlock did in 1981's “The Five Orange Pips”: Lure the KKK onto a boat, then crash it with voodoo.