You are kidding yourself. Islamic fundamentalism sees itself in a war for survival against cultural forces that threaten to overwhelm it and wipe it from the Earth. The fundamentalists are quite right about this, that's exactly what is happening.
They do not intend to go quietly. They understand very well that their resources are quite limited relative to those of their enemies, and that this will require them to use every ounce of cunning and deceit that they can muster, for however long they can last.
They are not insane, they are fanatics. They believe in what they are doing with a passion that overcomes even the fear of death. You are not going to get inside these peoples' heads. They were taught the Koran at their mother's knee. They have lived their brand of it all their lives. You are not going to persuade them out of it, or reach them with logic or reason. Theirs is a faith-based obsession, one that to them seems wholly justifiable and even righteous in its fury.
When people like this start murdering infidels in 5,000-person swaths, it is time for their crusade to end. It's too bad; theirs was an honorable cause from their point of view. But like Mastodons, there is no place for them on our Earth today. They must be destroyed, like a dog that mauls babies.
Much more than this, they are a Take Over The Whole World Club. That's what Jihad means. They are not content to live in their own enclaves.