There is a difference between practical statements and moral statements. You can simultaneously believe that nobody should die (moral belief), while also believing that assassinations are the natural consequence of unchecked capitalism (practical belief).

This is made particularly confusing in English, since the word "should" can use both definitions. eg, you should apologize (moral), vs you should protect yourself (practical)

I am of the belief that Brian Thompson should (moral) have been locked up for his actions. Having failed that, I predict that Brian should (practical) have been assassinated. And he was.