Why do Erik & MAB hate eachother so much?

[Preme]

I just saw the clip of Barrera taking a swing at Morales at a press conference (or publicity event?), and I gotta admit... it surprised me. I haven't seen that side of MAB too many times. Even so, he's still one of my alltime favorite Mexican fighters.

The reason why MAB stole on EM was because EM said to MAB:
Chinga Tu Madre.

Those are fighting words anywhere on the planet. You let some one (rayarte la madre) and not do nothing about it right there on the spot, you are a punk. We all know how much MAB loves momma Tapia

only if you know wtf that means o0