The way I see it, this guy was an intelligent, hardworking American, born and brought up in the US, attended US schools and loved his country enough to join the Army. (I say intelligent because it takes a lot of hard work and dedication to become a doctor in this country). Nobody can claim he was a brainwashed immigrant idoit with a low IQ forced to adopt his views on Old World Islam in some backward madrassa in some poor country like Afghanistan, Pakistan or Egypt trained by Al Qaida etc.
As such, thinking Americans need to reflect on why such an educated American would be so mentally disturbed in our great country to do such a terrible thing. Similarly, Orthodox Muslims should also reflect on the matter and ask themselves why bright people, such as these doctors (there was another Palestinian doctor in the UK who tried to blow himself up at an airport) end up making this horrible choice in the name of Islam. I believe there is a push and pull effect (In Urdu the saying is "Tali dono haaton say bajti hay") that sends emotionally vulnerable people into a state of mind that permits them to commit such hideous acts. It is easy for Muslims to say, western hypocrisy in foreign policy pushed him to do this and Americans to say, fundamentalist Islam pulled him into doing this hideous thing. However, I believe the truth is always somewhere in the middle. I think we all need to do some self reflecting now instead of blaming others.
bob