White privilege. Ronda and Weidman can be dicks because white media spins dickish white behavior win or lose as "Passion." The only time it is even slightly mentioned as bullshit is when it's from a super tatted, "urban acting" white guy. And even then it's more he has "not quite matured yet" like Jason Williams back in the day.
You can't celebrate as a black athlete because it's "bragging and poor sportsmanship" and not "taking things seriously." You think Anderson Silva didn't train to be able to embarrass the absolute shit out of people for a decade? He just woke up, put on tights, and styled on people? It is what it is: racism. Ronda's a petty little twatcicle. Weidman's name looks like the German equivalent of White Man.
With that said, I think being a petty ass winner is worse than a sore loser. Losing is supposed to hurt. Fuck am I mad about if I win? I knocked you out, but I'm bumping you after the fight when you want to congratulate ME for fucking YOU up (Ronda)? Losers look bad accepting defeat. Winners look lame as FUCK not being gracious in victory. It's like saying, "Yo, I really got beat up and squeaked by, so I gotta overcompensate and treat the loser worse to hide it."