Since Muslims accept Jesus as a prophet, isn't it obvious that there is no reason to doubt that Bin Laden was?

Because (and I'm agnostic...) that in Christianity there is a Heaven and a Hell, and sinners (in their mind, a mass murderer and plotter of mass murders, being Osama Bin Laden,) go to hell. They do not get a chance at forgiveness unless they believe in Jesus Christ. Which, as an extremist muslim, would be blasphemy to his own religion. But is many different Muslim traditions, I believe he would be considered a Martyr, dieing for his cause. But I don't know all of this for sure.