Satan Promotes Denominationalism
Satan does not want anyone to be saved. The Bible speaks of Satan as the one "who deceives the whole world" (Revelation 12:9). Satan rejoices at all of the religious confusion and division that is going on in the world today. Satan works ceaselessly to cause people to follow their false denominational doctrines instead of the Bible only. Anything that is more than, less than, or different from what the Bible says is false doctrine which is designed by Satan to cause people to be eternally lost in Hell. Satan has been very successful in fooling people, just as he fooled Eve in the Garden of Eden with his lies.
Satan fights hard to prevent people from obtaining the salvation God wants us to have. First Satan tries to keep people from believing in Christ. If he fails at this then he tries to keep people from repenting. If Satan fails at this and people want to be baptized, he tries to get them to substitute sprinkling or pouring instead of immersion. If he fails at this and people want to be baptized (immersed), Satan then tries to get people to first "accept Jesus as your personal Saviour" and say "the Sinnerís Prayer" in order to be saved and have their sins forgiven. Satan then tells people "who think they have been saved" to go ahead and be baptized to join a denomination, but not to be baptized to be saved. Those people who have been baptized, but not for forgiveness of their sins and to be saved, but just to join a denomination, then they still have every sin they have ever committed and will be eternally lost in Hell. Also in addition to what God requires for one to be saved, Satan has also perverted what God requires if our worship to Him is to be acceptable. None of the more than 600 different denominations have any Biblical authority to exist, but are sinful and ungodly counterfeit organizations of Satan.