Never be amazed by many white people's ability to dismiss black talent on ANY level (sports, professional work, education, politics, etc). I understand not liking Mayweather...I don't like him either (while also acknowledging he's a GREAT boxer). But hearing cacs not only claim Conor can win, but he'll "out smart" Mayweather is like a huge dog whistle man.
I disagree on the UFC being "created" because white people allegedly suck at boxing. It's a chicken/egg thing. I'd say white people have ALWAYS been annoyed on some level by black dominance of various sports, so those people naturally gravitated to the UFC which was majority white. But let's not forget that Brazilian jiu-jitsu is not a white creation, nor is it really dominated by white people. It's from Brazil and Japan. There are probably a lot of BJJ fighters there who could dominate the UFC.