No Excuse.
You know, this seems pretty unequivocal. From Egypt's Grand Mufti:
As for suicide bombing, Islam forbids suicide, it forbids the taking of one’s own life. In addition, Islam forbids aggression against others. Attacking civilians, women, children, and the elderly by blowing oneself up is absolutely forbidden in Islam. No excuse can be made for the crimes committed in New York, Spain, and London, and anyone who tries to make excuses for these acts is ignorant of Islamic law (shari’ah), and their excuses are a result of extremism and ignorance.I've wondered about the fact that Muslim authorities seem not to do a very good job of condemning terrorism in straightforward terms. But I'm not seeing weasel room here. That seems pretty definite. "No excuse." Good enough.