I think it is a mistake to label this guy and most the others as crazy. Their actions make sense according to their lights. Calling them crazy lets us and policy makers off the hook wrt understanding their motivations. For my own part i think this a deliberate tactic by the left and its allies, as an objective examination would be inconvenient for their world view and designs.
To a degree, I agree with you. Crazy is definitely a misnomer in these examples, especially if it's used to remove the onus of the deeds from the person who did them.
OTOH, I have a hard time not thinking someone who is perfectly capable, mentally, who goes out killing innocent people as crazy.
However, I still don't see the difference between the mental stability of this guy and, say, the Heaven's Gate idiot's who off'd themselves.
I want to make clear, I am not attacking religion or being one of those libtards who is defending Islam, because I'm not. Right now, Islamic extremism is an ideology that is catching a lot of these kinds of people and using them.
I guess what I'm more interested in is cutting off the real bad Islamic Extremists from their source of cannon fodder, if you will.