The truth is that before one receives Christ and is born again of the Spirit of God, they are dead in their sins and trespasses. Their heart is evil and their spirit is dead and they don't have the Holy Spirit in them. Therefore there is absolutely no way they can manifest any gifts of the Spirit. So whatever spirit is guiding an unconverted person is not the Holy Spirit, but another spirit that is not of God.
Also, if you read at the beginning of the Book of Acts, the Jewish leaders forbade the Apostles to preach in the name of Jesus. They had no problem with anything else about the need for having Christian values, etc., but they did not want them to preach about Christ and Him crucified. The Scripture says that there is no other name in which anyone can be saved, except the name of Jesus Christ. A person can preach and teach about the Christian religion until the cows come home and no one will be bothered about it, but as soon as Christ crucified and resurrected is preached, opposition and persecution rises up. There are many religious people advancing the Christian "cause", including Mormons, JWs, Christian Scientists, Christadephians, and even the Masonic Lodge, but these people are not converted to Christ. They are not born again of the Spirit of God. Bishop Spong is all for the Christian cause, but he doesn't believe in the resurrection of Christ, nor does he believe in the atonement, nor Christ being a real person in history. His view of faith is not in the promises of God in the Bible, but in what he believes is love for others and living a good life. That kind of "cause" will lead him straight to hell where he will get a rude shock when he realises that he was tragically mistaken and that the Gospel is true and hell is real.
The Scripture says that God has given Jesus a name above every other name, that at the name of Jesus, every knee shall bow. Therefore, if you are supporting a "cause" and not bowing down to the name of Jesus, then what will you do when Jesus comes again and you are forced to bow to His name?