There's a world of difference between being "pissed off" and appearing to be a raving lunatic, screaming unprovoked at police officers on their front porch.
If Crowley had've turned and run away, and Gates had continued to escalate the situation along the same trajectory he had, Crowley would be pilloried right now by the same crew for being derelict in duty. "Why couldn't they have taken him into custody until he calmed down and didn't pose a threat?"
If that is allowed, I can call 911 any time anyone pisses me off and claim someone told me this person threatened to do some sort of crime.
Our rights to personal property and against illegal search and seizure would be forfeit for rumors.
I would prefer the police observe my constitutional rights. They take an oath to uphold the laws of the land, the primary being teh constitution.