I mean, I surely understand the difference between faith and knowledge. But these do not have to be antonymious. They can coexist. Whilst science and knowledge is what helps us relate to the outside world, and to advance in the sciences such as forging, healthcare, economics and etcetera, faith is what helps us to relate to what is inside, and advance in the spiritual recognition. We need both to function as a nation. Some people, like yourself, are blessed with a certainty that allows them not to be bothered with the gods, but the average Aretian needs something to reassure him when he has been out working all day, something to give him a sense that the meaning of life is something more than mining gold or smelting cannons, and religion give him this.
I choose to believe that these "lesser" religions, such as Islam, confuse the people. If you can concentrate them on one faith and educate them in that faith alone, they will have an easier - and thus better - understanding of the spiritual sanctity. In my opinion, that is.