Why do I feel bad for bin Laden? Opinions?

Okay, I'm not a terrorist. In fact, I'm a New Yorker who lived and saw 9/11 firsthand. However, all of this celebrating someone's death has really taken a toll on me. I mean, he was human, but I don't feel like we should be mourning him. To summarize, I guess I feel guilty. That our different opinions, religions, and beliefs have to end like this. Also, waving the United States flag celebrating a death really makes me question what our country stands for. Does anyone know why I feel this way?