Yes, I am afraid it is. Here's the thing about these muzzies, they are completely fatalistic: whatever happens is the will of their moon god. Not science, not human actions, everything is the will of their false god. Thus, when the big one is dropped on Raqaa, they will get the message from the moon god and STFU.
And there's a second justification: assume that the "moderate" muslims, whoever they are, do not want to get fried. Maybe they will try harder to persuade their brethren?