This one, uh, I point-blank refuse to believe. The moral principles about how you can treat other people are so widespread and uniform (made it into the bloody bible, even; the only bit that everybody knows from that MLK speech is about this), that you're gonna have some serious convincing to do, before I believe that people "have different morals". It seems more believable that people have just the same morals they always did, but are applying them very selectively without proper justification (as it always is with prejudice).