Was it on private property?
Did they have a license?
Just those two questions need answering.
I must admit, that was a practise raid and COMPLETELY UNNECESSARY.
If they knew for hours in advance this was happening (and they had to....to be THAT organized), then they had plenty of time to send in a sheriff and some deputies and close it down without a license.

The American Waco mentality is pretty nutty. After all these years, I STILL don't understand it. An abuse of power, that's for sure. Those kids weren't hurting anyone. Probably some well connected politician with fear in his eyes that the youth of his town were getting out of hand, put in a call to some connected dude up the pipeline and brought out the swat team.
Disgusting.