That's why they are so dangerous. Despite all the claims of politicians to the contrary, you always negotiated with terrorists because that's how terrorist campaigns are usually ended. But there is nothing that they want that is reasonable or that we should be willing to surrender. There is nothing that will make them happy.
They just need to die. All we can do is keep removing them in as clean and surgical way as possible while at the same time empowering the moderate voices.
Every time some misguided fool (like batman) makes a big fuss when islam is criticized then we score an own goal and make it harder for the moderates to win. Heck, the regressive left object more to islamic apostates who speak up than to the monsters they are standing up against. It's insane.
But there is some truth to the idea that we have created the problem - the idiotic lack of planning after Iraq is the direct cause of many individuals involvement and the roots go back to seeding islamism as a landmine for the Russians when they were in Afghanistan. Of course our "allies" in the region are also responsible for weaponizing their own various versions of the religion too.