Many police officers have their hands tied in Europe. No police officer can push, kick or strike and it don't matter if the police officer is getting beaten up.
What on earth are you talking about? You clearly have absolutely no idea of what police officers in Europe are like, many would make the US police look like nannies. Most of them are armed, none of them are afraid to use force even when you would think it's not justified. You are making this all up. In the UK the police are actually very robust, come across and try to beat a police officer up, you'll find out for yourself. We have two police forces here that have always been permanently armed, the PSNI and the Ministry of Defence Police, others are armed as and when needed. the laws of self defence here are also very clear, you can defend yourself using reasonable force, this includes using a weapon and pre-emptive strikes if in fear of your life. If the woman you talk about had shot her husband in self defence and she was licensed to carry a weapon here ( yes many are funnily enough) she would not be charged with murder, if the weapon was illegal she would most likely be charged with having that and perhaps manslaughter but would be given a suspended sentence showing that the court understood the circumstances.
Stop making statements that you clearly have no idea about, you are making them up.