Yeah, we're not going to be in agreement on this one. Could care less that he's ATF. From the PD's perspective, there was an armed 'perp' attempting to gain (force?) entry into an apartment without properly identifying as LEO. There are multiple things to observe in the video that support this such as comments that he was trying to open the door without permission to enter and no apparent warrant. ATF guy even forgot about his ID on the lanyard until it was too late- he could have worn that externally. When the cops arrived he was uncooperative to the point it was illogical. He was behaving as if he was impaired- either mentally or via some substance. He looked a bit like your typical dirtbag and not professional at all. Also his manner of resisting was classic dirtbag, "I have a medical condition! My wife's pregnant! I can't breath!" and other assorted BS like fighting the officers trying to put him in the vehicle. If I were that guy's supervisor and saw that particular body cam footage I'd have demanded a drug and alcohol test on the spot. Honestly, he looks and acts like a drunk or a druggie. Either that or he's having a psychological problem.
Given the circumstances, I find no fault in how the local PD handled the situation. Everyone went home without surprise ventilation despite the sketchy behavior from the ATF guy.