I'd join Riz_ bhai and end a few of those people myself.
At first I would have done exactly what your father did (any civilized human being would). But if some ***** broke my car's window, I would lose my patience and just kill a few of those people, crank it in reverse, and make sure they're dead. At a point like that, I wouldn't care about the "poor" people's families. I'd take pride in knowing I killed a person who wasn't going to be of any good to anybody.
Alhamdulillah it's great to know your father is home safe. That's all that matters (Y)
My dada has a nursery near Chak Shahzad. That place looked peaceful to me- this just kills that image.