I believe the youths in this case are entirely wrong.  They can protest on the sidewalk, maybe even in the street though I'd say that police could arrest them for walking in the street.  

Being ganged up upon by many is to me a legitimate reason to draw a weapon. He courteously fired into the ground--so he demonstrated restraint by wanting to disperse an angry mob in the making, and he did not shoot at any person.

Several others in the neighborhood experienced vandalism to a point where they felt threatened. Imagine that, you are told to leave the safety of your own home instead of having the right to defend your own property.

Oh, my, I wish the youth of today had any respect and reverence for the freedoms afforded them.