Are all the religions same?

Joesph Campbell a comparative religious scholar studied religions all of his life. And he did find that all religions have common themes in them. So really all religions are the same in showing us how to live moral right lives. Good and evil are in all religions. How to treat your fellow human is in all religions. So really the fight between religions is silly, they fight over the 20% percent difference their religion has over someone Else's. Even christians fight among themselves over their different denominations beliefs i. e. baptist against Presbyterian. And in the case of christians they fight over the 10% difference between their religions. How many marriages would last if you fought over your slight differences instead of recognizing that on the majority you agree with each other. Its called being anal.