This is not the first time an MMA star has acted with WWE type antics. Hell, Tito Ortiz always talked a massive amount of smack and was either loved or hated for it. Lesnar may have went a bit far with it, but if the fight was entertaining who really cares. Alls sports have douche bags who talk smack, and MMA is no different. Hell, watch the NFL on Sundays and you see a sport full of egotistical *******s.
"The hero and the coward both feel the same thing, but the hero projects his fear onto his opponent while the coward runs. 'Fear'. It's the same thing, but it's what you do with it that matters". -Cus D'Amato