I couldn't disagree with you more - and moreso, most legal jursiditions do as well.
A police officer is not held to a "schoolyard standard" in regard to the use of physical force. He doesn't have an obligation to treat a male or female attacker differently merely because of their gender. His/her job is to protect the public. To this end, every police officer studies a use of force spectrum in which a level of level of offensive force is met with a prescribed level of return force. This woman grabbed a police officer with her hands- this is called assault and battery on a police officer, a felony in many jurisdictions. Her level of force would be categorized as combative: less lethal. Any less lethal means to subdue her are appropriate.
A police officer is not some person on the street. They have a firearm, mace, taser, etc. I can't tell you how many times I, as a police officer, have been grabbed by someone - male or female - and while grappling, that person has attempted to grab my firearm. If I let them do that, they immediately become a danger to everyone around them. When someone attempts to grapple with you, you don't have the time to grapple around with them while a number of other potential threats exist all around you. Your job is disengage them and subdue the target as quickly and safely as possible. I think this officer did his job as efficiently as he could.
A police officer is in a position of authority. If you act the fool with an authority figure, you deserve what you get.
Nope. Doesn't give him the right to victimize people.
I didn't say she should be treated differently because she was a women, in fact I've commented to the opposite of that. What I said was that the force was brutal and excessive; I would have said the same thing if it had been a man.
The notion that just because she grabs his arm, a haymaker is an appropriate course of action is complete and utter bullshit. There were a million other ways he could have restrained her, you just mentioned a few yourself; that's why officers are given those tools. Decking her was not efficient, it was barbaric and unwarranted by the situation. She was belligerent but unarmed and hardly posed a serious physical threat.
If what she did was a felony then she can and should pay for it in court, not on the sidewalk with a cracked jaw.
Has he been placed in a position of authority?
Yes, he has, but let's not forget that the police are civil servants, not gods. The rules apply to them too, they can't act however they want, and it's "okay."