Well, spiritually the church itself is called the bride of Christ. This may be realized as believers being the physical presence of God's work here on earth. So even spiritually you could not say that Christianity, or as some call it, sound doctrine, is the woman spoken of here. Now if you are correct and Christianity should be silent (which I don't see how that would be possible because what you say we should teach about, God is what Christianity teaches about), then in what way would Christianity be a helper? Which God should we teach? The god in buddism, which I think for the most part believe that we are our own gods, or the god in islam, or the god in hinduism, which would be considered idolatry I think by any of the Abrahamic religions, or judiasm, which if you also believe Christianity to be true, would be a shadow of and point to another religion, maybe we could teach voodoo, they are very spiritual, or wicca, or mother earth, or pigeons, I mean I don't think they ever hurt anybody. Have you ever studied logic, heard of the law of non-contridiction maybe? Is God the author of confusion, offering many different contridictory pathes to Himself? Or if any of these religions are true, would you not logically conclude that all others are wrong? Most of the religions you listed all have atleast this figured out, if they are right, then the others are wrong. Now in modern society in the name of tolerance you have many people who endorse all for the sake of not offending any. Many "spiritual" people today like to take religion with a buffet mentality, taking from each what suits them. I will stop the rant here.