Why is it important whether they're really a racist? How is being racist any more than trying to say the most mean-spirited slur one can by targeting unchangeable attributes of their victim?
"I'm sorry for saying shitty racist things but I'm not really a racist, I just get annoyed sometimes": a coward to boot.
I agree but what I would accept is that people shouldn't be labelled for all eternity by the worst thing they've ever said, just because it got caught on camera. They should be given the chance to apologize and change their attitude/ways. The "being labelled forever" issue is an unfortunate hazard of social-media. Racism is something people do, not something they are. I think. Probably. Except maybe Richard Spencer and Donald Trump. They've done it a bit too much - it's clearly now permeated their entire being.