OK after watching that, yes the cop was a bit testy, but it was in response to a very disrespectful mouthy kid. Not defending the cops actions just saying...
here is the whole scenario in one nut shell... just like many young men that didn't get to go home after a police interaction... Kid actually wasn't raised right. 13 years old and using a mouth and his fists like that? he's got a bright future in the system.
what do all these type of situations have in common? non compliance ... that starts with how you were raised...
I was quite the mischievous hell raiser when I was his age, but never a juvenile delinquent, I was never destructive or disrespectful toward anyone of authority... if those words would have come out of my mouth at any adult... my bible thumping mother and military father would have whooped my ass.. and I knew it!
said it before, say it again... not a race issue, it's a cultural issue