As I see it, none of the world’s major religions are pure. That is, everyone of them in one way or another serves in practice to obscure the truth as much as to reveal it. None are unadulterated.
This is especially true on “the village level”. That’s the level of the religion as it is manifested in practice. But even their holiest or most sacred writings strike me as at least a bit misleading at times.
I think a large part of it is because large religions serve many purposes. They are not just about seeking out and living according to the way of things — however that way is conceived. For instance, almost all of them concern themselves in one way or another with propping up the existing social order. Or — especially in the case of Middle Eastern religions — meddling with human sexuality.
On the whole, the major religions strike me as ores. They are varying degrees rich or poor ores, but they are ores. You have to learn how to refine them into something purer than their natural state if you want “pure religion”.