If I wish to be learn about imaginary things, I've only to read a book of fiction.
There is nothing constructive I or any sensible person could learn from any religion.
Now your going to say thats close minded, but I beg to differ. Having already open-mindedly studied many religions, I see no worth in any of them.
Actually, a major component of many religions is altruism.
This would be a lesson humanity could indeed stand to learn from.