i just dont this that would be very human.
No, your right, in today's society doing the right thing in the face of adversity never does seem like the natural or very 'human' way to act, it's quite sad really, you joke in saying "Grrrr, hear me roar because i am animal" but it all seriousness you would essentially be behaving exactly how an animal would react in the same situation if their young was being attacked, difference is the animal doesn't have any understanding and is acting purely off it's primitive animalistic instincts.
Now personally I honestly think my first concerns would be with the baby that is bleeding on the floor in the knocked over cart, I doubt the teenager would have been laying into the baby, they are not prone to go into basaltic fits of rage, at the most usually it's a one off action to dispel the thing that is bothering them, and the carers would have immediately told the parents that the teenager is autistic and restrained him, with the seriousness of the incident I don't think in actuality you would've of had time to get angry, I personally think you would be tending to your baby, the anger would have came after.
Now if it was an older child that got hit instead of a small fragile baby then I think the situation would have been different, and you would act your on anger first as you would've known the older child would ultimately be fine and recovered, but the fact it was a baby and the severity of the situation a lot more serious then I
think you would go into autopilot mode and tend to your injured baby first, by which time the teenager is already restrained and the police/ambulance is already on their way.
This is just guess work at the end of the day though, but I do think that this is essentially how it played out in the real incident, you see many people on here say that anyone in the same situation would 'smash the teenager in the face' etc but people forget, this really did happen, and as far as we know the parents of the baby that got injured didn't 'smash' the teenager in the face, so based on the
real incident, what many people thought would be 'the normal way to react' in this particular instance it actually wasn't.