This question is misguided. The vast majority of islam is waiting and watching, and tacitly aiding and abetting the jihadis all the while. The issue which we once had a chance of addressing, was rather, How to insure that we keep "all Islam" from becoming the enemy?
The answer, which we up until recently were in a position to deliver, was by decisive and determined action, leading to unambiguous disaster for the jihadi wing of islam. But the James Baker/Colin Powell types got it wrong, and thought we could "win the hearts and minds" by being tentative, pulling our punches, and letting dirtbags like Sadr organize his forces, instead of arresting and /or killing him outright. If we had done Iraq in convincing fashion, by crushing domestic insurgents, sealing Iraq's borders and annihilating any foreigners attempting to cross, we would have a much more agreeable Syria on our hands, and a much more cautious Iran. We had the option of being 'the strong horse' but chose foolishly to be 'the weak horse' instead, and we are paying for this now.
The chance will come again, unfortunately, and the stakes and cost will be even higher the next time; so god help us if we fumble the ball away again on the next possession. It may be our last.
Sorry about the multi-post. mea culpa.