Sep, plenty of people have no problem with killing people, actually, whether in theory or practice, and whether for pragmatic reasons or because someone does, indeed, have justice coming to them. For instance, most law enforcement and military, like myself and my family, are going to have this mindset (if not, they're in the wrong profession, IMHO). That said, yes, of course, it's usually wrong, but hardly always. Case by case basis.

And believe me, military & law enforcement look at your sensibilities funny too! Civilians say the darnedest things sometimes ;)