The Coming One world religion ,Antichrist & Mark of the BeastRevelation 17 speaks of a "great prostitute" (or "great harlot") that is generally understood as a metaphor for a false religion that will exist during the tribulation period.
The false religion of the last days will consist of an inclusive religion that allows for a pluralistic view of God. This would include even liberal monotheistic groups that see "all religions as one" and are willing to worship the Antichrist in the last days.
Whatever this religion is, it will certainly exclude any faith that is exclusive and refuses to worship the Antichrist or his image. Revelation 17:6 states, "And I saw the woman, drunk with the blood of the saints, the blood of the martyrs of Jesus." This false religion will permit and even encourage the death of those who follow Jesus during the tribulation.
Further, this false end-times religion will include sexual immorality (Revelation 17:2). It will also likely have its headquarters in Rome, often described even in New Testament times as Babylon (Revelation 17:5; 1 Peter 5:13). The specific one world religion of the end times cannot be fully developed until the tribulation when the Antichrist rules. However, the growth in religious pluralism, interfaith dialogue that promotes the idea that all religions are equal, and the erroneous teachings that many ways lead to God or to heaven all exist today. These views certainly foreshadow what Scripture predicts will be more prevalent in the future when the world unites under one religion under the power of the Antichrist.
The apostle Paul warned Timothy about this concern, saying, "For the time is coming when people will not endure sound teaching, but having itching ears they will accumulate for themselves teachers to suit their own passions, and will turn away from listening to the truth and wander off into myths" (2 Timothy 4:3-4). As believers, we must study and live by the truth, avoiding the false teachings of our time.