In the case of the suicide bomber in the Reuters dispatch that Doug posted here, who knows? Has any organization claimed responsibility? If one has, we would know, but otherwise, we have no way of knowing who did it and why.
What's clear is that those who have taken up arms against the occupation are divided multiply: some are Shi'i militiamen, like the Mahdi Army; others are Sunni guerrillas of diverse political tendencies; and yet others are foreign jihadists. Among them, the only faction whose political program we know even a little about is the Mahdi Army. The conditions in Iraq are so dangerous that it is impossible for us to get reliable accounts about who's who of combatants in Iraq. -- Yoshie <http://montages.blogspot.com/> <http://mrzine.org> <http://monthlyreview.org/>