If John Brown thought like that slavery in America would have lasted longer than it did. Some people deserve it and their passing makes society better. I dont give a damn if its ethical or not if it fixes an abhorrent evil. Peace didn't stop slavery, peace didn't stop the nazis. Peace didn't get gays in America rights. Peace didn't secure labor rights and basic safety laws.
I'd be more comfortable with someone treating it as a somber necessary evil than referring to it as "ecstasy ". At that point you just want to kill people but with extra steps.