The cop mishandled the girl. There is no excuse for man handling a teenage girl in that manner if she poses no physical threat to you.
And if she resists a peaceful order to leave the area? He was a bit rough with her yes, but when you repeatedly ignore orders to leave the area, what other options are you giving the officer?
So when the ATF comes by to confiscate your guns, you are going to totally cooperate with them?
Hey, remember when Cliven Bundy and his buddies were waiving guns at Federal agents? That seems a lot more serious than a pool party. But those guys were white.
There's no excuse for what this cop did.