God is Supreme. He is God of all, not merely God of the Koran, the Bible or of the Vedas. Considering God in a personal way I do not agree to say that He is in everything. Everything is sustained by God, but God is not Personally in everything. Nevertheless, God described in the Bible, Koran or Vedas is the same conception. Differences arise in specifics based on the time and circumstance of a people. A Christian may not accept that the God explained in the Koran is the God of all just as a Muslim may not accept the God described in the Vedas. Spiritual communism doesn't have to mix religions together. Actually, I think that is a bad idea. In spiritual communism people can form socieities based on what they follow. That is really the only way it would work in this degraded age. Otherwise, it is my belief that Religion is actually One. It is only divided due to divisions of people.