In your view, all world religions manifest the Holy Spirit? In Christian thought, this would represent a serious heresy (indifferentism, universalism, etc.)
In my view, if it isn't founded upon the Holy Spirit, it isn't a real religion. I don't believe there is more than one Holy Spirit. But I also think that God is infinitely creative, and never leaves a culture abandoned. So the Holy Spirit is where you find it, because the Holy Spirit is free from human limitation. But demonic influences exist as well, and so discrimination is needed.
I feel the same way about people. Everyone talks about their group associations, but I've found that a people's characters vary widely within any given organization - even religions, East or West. The group is not the person - and the group doesn't get the person off of responsibility for their own life.