This is childish stuff, to be honest. Since we're discussing it, if anyone thinks Khabib is scared of surrounding Khamzat, you're in over your head. Khabib has matured a lot being in the spotlight as champ, meeting heads of state, heads of security and intelligence agencies, multi-billionaires etc, across many countries. He can't be the special guest of Prince Hamdan of Dubai one night and getting into fisticuffs the next night. He is not the same khabib that surrounded Artem and slapped him for talking shit. But rest assured, Khamzat pushes this too much, and he will get it and it won't be pretty. Khamzat can defend himself and he is the bigger boy, but Khabib is a master at this while Khamzat is still learning. It will be a gang bashing like no other and Khamzat won't know what hit him.
But he apologised - he realised he made a mistake in making a stupid comment, he got dropped by Dominance MMA, and lost a tonne of followers. So he was being respectful leading up to UFC 267.