Umm... both sides in that exchange were portrayed as assholes.

I miss Cena.

fussing over a car..with other guys

You know, lathering up a sleek, powerful cherry-red automobile with his friends... getting wet, slippery... accidentally bumping hands by the rear fender, then purposely doing so.

So he beat up the one of the rapper guys from Teen Witch while his buddies watched?

That was kind of my point. Most people who watched these movies consider, at best, both sides are equally terrible human beings here.

That's pretty fucked up.

oh, fabio... you're so bad at what you do.

He was already set up as a bad guy when he is described assaulting a woman. He is working on his car because it's something you do outside your house, and he had to be outside his house for Henry's girl to witness the beating, which is the whole point of this scene. I guess he could have been like watering his lawn, but you do that alone, and I think the best part of this is the dumbstruck reaction of his friends. The aim of this scene is not vicarious revenge fantasy but to illustrate the difference between Henry and normal, albeit shitty, people.

One dog barks, one dog bites