Tony Ferguson was constantly interrupting and making fun of Khabib while Khabib was trying to be respetful, went as far as insulting Khabib's manager and family.
Tony then got told the fuck off about street fighting and being a "Mexican".
This perfectly illustrates the mutt argument, Tony Ferguson was claiming he's a californian, a mexican then an american. Basically, Khabib rightfully calls out he's a lying pussy fake mexican bitch.