The Santa we all think of has almost nothing to do with the real St. Nickolas, who was born in what is now Syria.
The Santa Americans think of is not a real person. He is a symbol of the Christmas season.
The usual depiction of him is White, of course, but that is not important to those who realize that he is a symbol.
What race is Rudolph? Is Rudolph a mutant because of his glow in the dark nose?