The thread has nothing to do with military, or any other state sanctioned sort of killing.
It referred to some one committing murder, which might be justifiable homicide in their minds.
If they really feel that strongly about it, they should confront their victim so as to ensure the victim knows who and why.
How much satisfaction could there be to console an assailant while serving their time in prison if the victim has no idea who did them in?
You really think murderers are being rational when they are pulling the trigger?