This sounds an awful lot like “don’t have opinions, because other people will have different opinions.”
Ok, someone will take pleasure in the murder of someone I think doesn’t deserve it. So what? Obviously I don’t like that, but people think all kinds of stuff I don’t like. Why should this particular opinion change mine?
Virtually everyone would take pleasure in someone’s murder. Osama bin Laden, say. Hitler, if we were in a different time and he hadn’t done the job himself. There are some people so principled they really wouldn’t feel that way for anyone, but for most of us it’s just a question of who falls into that category. Is has been a little surprising to find out that so many Americans consider this guy to be worthy, but just a little.