Is this the explanation of the Muslims stance on Islamic terrorism?

The terrorists are not a “radical” or “fundamentalist” sect that had twisted religious doctrine for power and politics, or that came to recast aspects of their faith out of some form of insanity. They are simply an Arab Muslims warrior caste involved in an armed jihad — a mainstream Muslim doctrine. This is how the physical jihad has been understood since Mohammed revealed it as the prophecy of Allah. Obviously, not every Muslim is obligated, or even really inclined, to take up this jihad. Indeed, many Muslims are loath to personally embrace this physical struggle. But that does not mean they do not support it, and their choice not to join the terrorist groups personally is similar to the choice of many Westerners not to join the police force or the armed services- which does not mean they do not support those institutions.