whoever that is, he/she is a a$$. So, you don't car about the Iraqis, only the Americans? Since when did the Iraqis not deserve respect? And all religons deserve respect. Did nobody ever teach you to respect each other's traditions and ways? Just because it was one islamic person doesen't mean every islamic person is bad.
So in all,
Yes, you shouldn't be cold and start to care about other people's lives that have been made much worse than yours. You are lucky compared to the thousands of childern, etc.. in Baghdad.

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