"Whatever actually happens in an act of political violence, there will be someone, somewhere, who claims that victimhood means innocence, and that innocence justifies more violence by hands that remain ever blameless. This sort of logic
is already all over the internet. That move was made in all the fascist cases. When the German Nazis took over Austria in 1938, they raised a monument to their martyrs. The Romanian fascists killed to avenge theirs."
For fun, academic balance, the purposes of debate, here's William Hogeland arguing that historians probably can't teach us as much about current affairs as they pretend.
(I'm aware this is by definition an ahistorical approach to life, and not one I necessarily agree with.)