But what's the line between being careful and being cowardly? What's more important, doing the right thing or just doing popular things just so he won't offend anyone? Doing the right thing should be hard, not easy. Altruism does not mean much if you do not back it up with real ideas and actions, its just a greeting card saying then.
Superman is an immigrant, I think a story about immigration could be interesting, but it requires some guts to write it .