On the one hand you say that Islam depends on interpretation on the other hand you say that Osama and gang are incorrectly interpreting Islam. On what basis do you make the claim that their intrepretation is incorrect? They are only following the tenets of Islam, and atleast in their minds, possibly better than you. In their opinion, you are not a very devoted follower of Islam. To them you are a fake muslim. What drives your conviction that your intrepretation of Islam is not fake but theirs is? By the way, folks who try to prove their religion is better than someone else's are deluded. Such comparision, at best, can be called comparing apples to oranges - at worst, its unbelievable stupidity.