Out of curiosity, how many Americans who feel the character should be changed also feel that the content of urban black rap music should be judged and dictated by the standards of the white majority? After all, glorification of misogyny, violence, and crime are offensive and never ok, yes?
Should Ice T have changed "Cop Killer" to appease critics who didn't understand the song's meaning? Even though he claimed the song was a protest and not actually advocating the murder of police, he should change it anyway because by some people's standards it doesn't matter and is never ok? What's wrong with just changing the words to "I'm slightly disgruntled about police brutality" so old white people don't have to be offended? That's all part of a tolerant and just society, no?
We fight back against racism because it causes harm to society, not simply because it exists and we don't like it. What actual harm is Zwarte Piet causing? What division and hatred is it contributing to, what discrimination is it informing? I don't think anyone has really given any such answers; it's only "well, this type of thing is offensive" and "look at these other examples where similar things DID hurt people." That doesn't cut it. If you want people to change something that they genuinely cherish, you need very concrete reasons that NOT changing is harmful to someone, something, anything.
The best argument this debate has produced is "it wouldn't hurt to change it, so why not?" No, it wouldn't hurt. But I can't see what it would help, either, other than making a few people who are tilting at windmills feel like they "won" something.