Hi Rapaire
I don't consider any of your above situations as a cold blooded murder. I see Hitler & Bush in the same light, only one not as bright as the other. If a robbery takes place & someone is killed & it wasn't intentional, they took a life & will have to pay. Bad choice. If they walk in blow away the guard, again bad choice but no chance of redemption in my eyes. I agree with you that there are many shades but there is no escape, reason, rational & you cannot make up or live with that kind of action, that's pure evil.
The lifeboat's full you & the survivors can live with it. The lifeboat's got room for more & you don't want to share the room or don't want to ration the supplies, someone needs to pull a Gypsy Rose Lee.
Barry