The cop acted exactly the way I would expect any cop to act when spoken to that way. The problem is, the camera was rolling -- probably another YouTube fame seeker. Because it's now public, I agree that the cop needs to be fired.
So you expect a cop to act in a way that merits firing any time someone asserts their constitutional rights?
No. I'm being realistic. You're the one living in a fantasy world.
Would you expect to be assaulted while walking through Central Park at 2am or would you say that you have a constitutional right to walk on public property any time you want?
Me? I would expect it. If it didn't happen, all the better.
"So you expect a cop to act in a way that merits firing"
I would expect a cop to react when a punk mouths off. You don't think he will. Fine.
May I suggest you talk to all cops like this in the future -- assert your rights, dammit!