ummm, I'm pretty sure most wars are ideological in basis. And even to the extreme, an ideological war can be fought and won or lost. What is meant is that some groups will never forget and fight for multiple generations. Sort of like Hatfields and McCoys. And oddly, if you examine all wars fought in the MiddleEast, where water is scarce, all conflict occurs at or near ... water resources. So perhaps the concept of ideology isn't the main issue at all. Or we can just say that wars can't be fought without water. A point to make is that everything isn't as it appears to be. Troops that fight for ideology can be at a significant disadvantage. As usual, exceptions to everything, sometimes they win.