His is a unique situation. It's unusual that someone raised in the US from childhood on and wasn't bombarded by the martyr BS from birth would do this sort of thing.
Purely academic anyway, this guy will never see the outside of a prison whether he's crazy or not.
I didn't count the %5 from conception to 3 years of age.
As unique a situation as the London bombers?
Also, how sure are you that he wasn't "bombarded with the martyr BS" at his local mosque?