I am a human on this planet that has to suffer the consequences of other's actions, that's who.
Would you ask a rape victim "who are you to judge that person as a rapist"? Would you denigrate them for using lethal force to defend themself from such an assault?
That person raped my country for 4 years, and probably yours as well. "Because when you're famous they let you do it, you can grab em right by the pussy." And he's trying to do it again.
Edit: furthermore, trump has also actually raped people. What if one of them were to have taken the shot? Would that be different somehow?
So you would've sided with the nobles getting guillotined rather than the people doing the guillotining?