It is possible to overanalyze this. Best solution: kill them before they kill you.
There is a Russian method:
http://visualrian.ru/images/item/695656
A group of soldiers at village ruining a building believed to be a Moscow suicide bomber Jannet Abdullaeva family home.
Aniother similar video:
http://visualrian.ru/images/item/683841
As for me it looks like good enough.