I had a religion teacher once. She was a devout New Christian loon who had moved to Sweden from the states to be part of Swedenborg's religion close to where her prophet was born. She was not even an outstanding teacher. She was pretty biased in favour of New Christianity. But all it took was her mentioning other religions and having us read the literature for it all to sink in. She "knew" the true religion. So much was obvious. You don't need to be smart or even well read to be a teacher. Just to be blessed as a pedagogue, and know a little bit more than the students.
I'm still happy I was in her class. And as always, learning in school is more about being a diligent student than being exposed to great teachers. It's allowing oneself to be exposed to information that's the hard bit. Religion is mostly quite boring, so it's good that we get forced to read it in school. At least we in Sweden are.
Not only do I know Muslims are crazy. I also know why. I've been hanging out with devout Sikhs in Bangkok, (they have a massive beautiful temple hidden in the slums there) and been to a Kali puja in Hampi, (an huge temple complex hidden in the deep jungle in India). None of that would have happened if I hadn't been forced to understand their point of view in my youth. I'm sure of it.
It is very hard to understand purely abstract, (and fantastic) concepts. It needs some guidance. How would you explain the "unmoved mover" theory to somebody who'd never heard of it.