This deadly enemy of the West -- the Islamist ideology which holds all Jews, Christians, other non-Muslims, and a considerable number of Muslims, too, to be human filth in need of extermination -- is well infiltrated. Events like that at Fort Hood prove this, and from what I can see, the problem can only grow with the passage of time.
Getting at Islamist cells, to say nothing of lone, self-appointed jihadis within our society, means getting over the false sentimentality that turns a terrorist incident into an "incomprehensible tragedy" when it is not incomprehensible, and not a theatrical event.
It also means ripping through the politically-correct drivel that is put in the way of investigators. They should surely be allowed to assume that every loyal Muslim will be eager to give information to help them identify any potential killers in their midst.
We'd be better off confronting that Islamist enemy, than spraying perfume after each fatal strike.