It's the new logic. We may be doing the bad thing, but our worst enemies also do the bad thing, therefore the bad thing is good q.e.d.
I don't know, seems pretty debatable. It also probably depends on your ethnicity.
Also, police mistreatment is not only killings (which can be sometimes be justified and other times not) but also rights violations and other lesser violence. For example, you are extremely unlikely to be killed by Japanese police (they can bet perps will not have weapons) but once you get arrested, you have very few rights. Other places are rife with bribery and corruption (Mexico, Brazil). In Spain you might get the rubberhose treatment, and anecdotally, I know someone who got a very nice dog sicked on to them by the police in Germany (it looked like you were running away!).
Not really feasible to put the 2. Amendment Pandora’s box back together to get similar logistics in the US I fear.