Hey, c'mon, c'mon. He's allowed to have an opinion. Using your imagination is good too. So, if he wants to imagine Muhammed Ali as an MMA fighter, he can darn well do that.
One thing I do question is Rickson as a top MMA fighter. I respect Rickson, definitely. But, he didn't do an aweful lot in MMA. And, he didn't really fight any top contenders either. But, if you like him, that's cool.