Of course I would have killed Hitler if I could. But I would have done so when he was actively doing harm, being the leader of genocidal movement / state etc.
I wouldnt pull the trigget when we already removed similar people from power, redistributed all their wealth, destroyed the institutions that they used to stay in power etc. I would have better things to do in that situation.
Also I think there is a difference between building some kind of system to choose, detain and kill those people on bigger scale and just doing some revenge before, during or shortly after a social revolution. I wouldn't stop anyone from doing it, its just not something I would support as solution to a problem.
Here is a summary on "debanking" happening in Germany the last few years. People use the word debanking when banks close accounts of organizations/groups because of their political activity.