Is it possible that they actually believe that there should be no retaliation?
My husband was telling me of a story in Michigan (I don't know all the details) where a policeman pulled over a young guy and then decided he was going to be a nice guy and deliver him to his parent(s). The guy got hold of the policeman's gun and killed him. My husband was telling me of one comment where presumably another black was stating that the cop was a racist and shouldn't have pulled the guy over in the first place. Unfortunately you see this with some blacks. They don't think other blacks should have any consequences to their behavior. It's the same with Arabs. The cop was the bad guy for doing his job and the Jews are the bad guys for finally standing up. Whatever evil is done, no matter how horrific, some will excuse it until their dying day.
I recall the movie, HOUSE PARTY (1990). There were two white cops who were portrayed as inept buffoons as well as irredeemable enemies of humanity, such as it was conceived of in the movie, notwithstanding that they were solely responsible for detecting and thwarting an attempt by some rivals to commit lethal mayhem, such as burning down the house with everybody in it, IIRC. I thought it very strange at the time. This attempt at mass murder was treated as a comical episode, and the actions of the cops were not credited in any way as a beneficial, let alone heroic, act. I guess I still don't get it.