It's local news to me. I generally have full faith in a jury so I can't judge them. The problematic factor is he stabbed several people. The beneficial factor is he stabbed some disgusting sh&theads and I really wanted to send a message to hostile millennials that we've had enough of their repugnant behavior. The key evidence that I think the whole case hinges upon is how deep was the water he was being shoved into as a deadly weapon? If he felt like he was going to be drowned by unruly thugs, that is the reasonable defense. I think cutting the guts out of one offender was legitimate, doing it again to several others was unnecessary.
You could argue that the rocky bottom (was it? I thought it looked it) was a risk from being knocked down (potential head wound). A friend got killed last year from being punched once, hit the concrete and brain injury.
You and I have similar views about the teens. They’ll probably think they’re heroes now they’ve won. Mind you they probably already did.