The early fight of Muslims from sixth century was for the conversion of Non-Muslims into Islam. And they succeeded in it on a big global bloodbath. But after this success logically they should have stopped fighting but they didn’t. They changed the mode of fighting and named it separatism as the new cause of war. It means separating their territories from Non-Muslim rulers and establishing their own rule. Even after succeeding in separatism at several places in the world they are still fighting.