I'm a total newbie to this game, but I did play CK1 a lot and one difference with it irritates me very much. In CK1, I could invade a pagan or muslim country time after time and tear it apart eventually. Now it seems I can't do it. I declared war on Pechengs over a duchy, and upon my winning the war, the pagans became my vassals with -100 relations with me. They rebelled, I beat them again, and again they were my vassals. It seems like it's not going to end, ever, unless I manage to convert and appease them, which could take ages for all I know. Is there a way to get a duchy off a pagan ruler and not make him my vassal? If not, is there a way to remove his titles from my realm? And what sense does it actually make?