But if you feel compelled to change the race of a character...
No one feels "compelled" to do so. The only "compulsions" under discussion here are the kind of obsessive-compulsive impulses that underlie the objection to colorblind or any other kind of nontraditional or unexpected casting.
I just noticed someone in the "Dragonball Z" topic announcing that they won't see the film because Piccolo isn't green. Exact same nonsense.