This may be the most convoluted thread I've ever seen on the forum. Denial of your rights, under color of law, causing you bodily injury is punishable by any penalty up to and including death for the cop. 18 USC 242. It is an unchallenged rule of common law--and every states' statutes, that you have the right to use at a minimum escalating force, up to deadly force, if in fear of your life or grievous bodily harm. The most recent adherent to this is Castle Doctrine. It takes away your duty to decide level of force if in your domicile. Under "normal" circumstances, you may not use force to resist an unlawful arrest. You have other avenues for redress. If you choose to do so, the burden of proof is on you to justify it--at whatever level. A black man resisting a group of klan members wearing badges wanting to "arrest" him has a bit stronger defense against any level of force than I do if I blow away a cop who is conducting a warrantless--and PC lacking search of my car and finds a nickle bag. The guy (Weaver's friend) who killed the Nazi "us" marshall at Ruby Ridge after he had shot the boy (Weaver's son) in the back was found not guilty. His use of deadly force was justified by the illegal action of the storm troopers and his fear of greivous bodily harm or death from their denial of his civil rights.
I don't care what case law says: the only answer that is correct is 'it depends.' In John Bad Elk v. U.S., 177 U.S. 529, the court reversed and remanded for a new trial. Their key finding that taking a cop's life when resisting a false arrest may well not be murder, but "only" manslaughter. Voluntary manslaughter carries up to a life sentence. So, it may be fully justified, op cit Ruby Ridge, or "only" manslaughter, or murder. There is no clear answer except "better to be judged by 12 than carried by 6."