When will they admit that the problem is not just one of "individuals"?
"A category mistake, or category error, is a semantic or ontological error in which "things of one kind are presented as if they belonged to another", or, alternatively, a property is ascribed to a thing that could not possibly have that property." [...] The first example is of a visitor to Oxford. The visitor, upon viewing the colleges and library, reportedly inquired But where is the University?" The visitor's mistake is presuming that a University is part of the category "units of physical infrastructure" or some such thing, rather than the category "institutions", say, which are far more abstract and complex conglomerations of buildings, people, procedures, and so on."
In this case, and in many other, politically myopic investigators are scrutinizing actions of every single jihadi, be it Nidal Malik Hassan, or Beltway Snipers, or London Butchers, or this one, without even trying to understand that they are all soldiers of a larger army, and that they are all sicced upon infidels by mullahs in mosques. All these jihadis are expendable material, and their individual tactics will be all over the place.
If a problem is incorrectly defined it becomes unsolvable. You cannot treat symptoms, you have to treat the disease - but for that you need to understand that high temperature or running nose are just outward signs of a virus in your body.
I think politicians are just afraid to deal with the real problem. I am not even sure it can be dealt with democratically - not any more than two wolves and a sheep democratically deciding what's for dinner.