It seems you are making a statement about the prevalence of Islam in a northern region, but your statement may need more context for clarity. In many areas, especially in parts of Africa and some regions in the Middle East, Islam is indeed the dominant religion. For instance, Northern Africa is predominantly Muslim, with countries like Egypt, Algeria, and Morocco having majorities that practice Islam.
If you have a specific region or context in mind, please provide more details, and I'd be glad to help elaborate or provide more information!