I take issue with your numbers (references, please?), but let’s say you are right. A full quarter of the world’s Muslim population, or 400 million, are sympathetic with jihadists. Your implication is that these 400 million are a fertile ground for violent terrorists. Typical fear-mongering. Or do you propose we attack them simply for being sympathetic? People are allowed to hold beliefs (which we may disagree with) and still be peaceful.
Whatever your numbers, there is absolutely no reason to believe that more than a tiny percentage of them are predisposed to violence. It makes sense to fight against the actual terrorists; it makes no sense to fight against the rest of the Muslim population, regardless of their sympathies.
My point was that we need to respect the peaceful, not antagonize them. There is no scenario where direct confrontation with them doesn’t lead to a horrible outcome.