I suspect that AQ and the loose conglomeration of multiple entities known as the Taliban have tipped over the edge from messengers of ideology to ongoing commercial concerns. Terrorist 'organizations' inevitably develop in one of two ways: either sustainment of the organization becomes an end in and of itself (see IRA, FARC, PLO) or they disappear from view (Red Brigades et al).

I doubt that any number of anti-terror fatwas, while welcome, will at this point have much effect on 'matured' Islamic terror groups.