Attention whore.
He was putting himself over, and the world bit. That's this guys m.o., not the first time just the most high profile.
He's a clown, and for him to bitch about the racist shit he's getting on twitter is pretty amusing since he choose to put on a minstrel show.
And yes, it's absolutely 100% classless, that really isn't up for debate. The question is whether you as a fan think professional athletes should be held to a higher standard in a public forum. Personally, I don't watch sports for that shit, I can do without it. The NFC West has been the lowlife division for a few years now, all four teams. Nothing but jawing and fights. It gets tiresome.