Actually in most civilized society the proximity of his yelling it is.
Based on what laws I am reading regarding this context, at very minimum it would be a Class C Felony if someone was willing to take it that far.
People often mistake assault for battery or vice versa.
And for people who can be non-biased, he is clearly "chest pushing" the guy.
But whatever. Just more lower end aggression that is acceptable when the left does it. Someone on the right did this people would be losing their minds.
Also, not sure if its been shared before, but apparently hes bitten off more than he can chew before so now he has demoted himself to picking on people ever shorter than he is lol: