I don't think our hands are anywhere near as bloody when it comes to this matter as bin Laden's are. We can appreciate our role in this awful situation, while still celebrating that he is no longer at large. If you create a monster, isn't it your duty to neutralize it?
You think that GW Bush, who cost lives due to mismanagement and incompetence, is the same as bin Laden, who deliberately killed innocent people to spread terror? I'm sorry but if you can't understand how and why these two people are not comparable in this regard, it's like someone said earlier that we're really quite done here. We're not going to be able to connect if you cannot see the difference between them, because I think there is a huge difference, not that I'm a fan of Dubya.
In any case, if people cheer his death, no, it won't phase me. They have the right to respond how they choose.