Too many people don't see it as siding against the police, they see it as siding with TR, and that's a no-no. My bet is that if it was some random rube protesting climate change -all the details being the same- it would be a different story, and it would be cop-pointing as usual around here.
Anyway, I don't think this is completely outrageous, it's not like it's a charge out of thin air, he was a disturbance of sorts- but they weren't fair with him. The cops were there the whole time, and he spoke to them on occasion, even asking what he was and wasn't allowed to do at one point. They gave him no warnings and never gave him a chance to leave as far as I can tell. They seemingly just hauled him off. Unless I'm very wrong about the details (I didn't look too closely I admit) I'd file this as being suspect.