I don't understand why you would expect someone who spent their entire career spreading bile, vitriol and division to be remembered for or with anything other.
I am in no way shape or form any sort of moral authority, but I can't imagine celebrating the death of another person without feeling like a disgusting piece of excrement. Especially to do so because a person has a different opinion from me. If you want to celebrate the death of a child molester or rapist I can understand that. But this excrement is a serious mental freaking disease.
It's especially interesting for people who feel like they have the moral high ground because their opinions are better than someone else's, then to act out with glee upon to them dying from freaking cancer
Osama is the one exception to that rule.