Revelation 15: Introduction to the Plagues of Revelation
The seven plagues are part of the Return of Christ. They are preceded by Christian on Christian persecution. The difference between these Christians is not their doctrines but in their hearts. The people with the mark of the beast are TRADITIONALISTS. They accept doctrines that have been developed over the centuries and persecute other Christians as dangerous heretics. The same controversies which we see today will form the basis for persecution. The difference will lie in how much power God allows Satan to persecute His true people.