That's not a standard, that's a case study. I believe it's wrong, but I bet I believe that for a different reason than you do.

What multiple times of wrong are there that apply to shooting babies in the head that lead you to believe you think it’s wrong for different a reason?

Quentin Tarantino writes and produces fiction.

No one really believes needlessly shooting people in the head is an inconvenience only because of the mess it makes in the back seat.

Maybe you have a strong conviction that the baby deserved it. Some people genuinely are that intolerable that a headshot could be deemed warranted despite the mess it tends to make.