Cynic: the "edit" button seems to have disappeared. It was there before!
And whether extremists would exist without moderates or not is all in the name... who gets to be the kettle and who gets to call who black. Obviously, extremists don't think the moderates are "pure" enough or faithful enough to the religion. So they want the moderates gone (dead). But even if they succeeded, there's no reason to think it would end there. As long as the extremist mindset were the norm, the fight would just keep on going over who is more "pure" (or, extreme).
Elemenope: I suppose that as a moderator, it is your job to infuse moderation into the debate at any cost. And I can appreciate that. But that's all I'll give you. You have not convinced me one bit in this debate.
I don't think islamic world domination is actually in the cards but only because we would fight it just like we fought the nazis, at a great cost.