Has MMA turned into Ju-jitsu?

Well there's this one guy at my Kung Fu cl that trains in MMA(black belt by the way). And after cl he went against another black belt dude and he was in the dominant position and was wining. The guy that trained in MMA beat the dude that only did Kung fu but they both did kung fu. And he was dam good too. And I trained with the MMA dude and I thought he was gonna kill me. He hip tossed my like I weighed like a feather. And im good 200 pounds.