Why are we afraid of these morons?

Read this

Falafel vendors in Baghdad - falafel is a dish made of fried chickpeas - have been shot dead ostensibly because there was no falafel in the Prophet Muhammad's time. The ice merchants have been similarly threatened.

One does not wage a "global war on terror" on lunatics; one finds them and confines them in institutions. One brings them before a judge and gets them committed.