You are pointing towards racism without backing it up. Back it up and you might get less "outrage". I could assert it's because they have higher thetan levels, just so long as I don't have to back it up. That doesn't mean it's true.
Sure it's possible it's racism but I've pointed to another reason that I can backup. Can you? I've actually thought about this a lot with it being the hot button issue for the last two years. I'm not just pulling reasons out of my ass.