They were being hunted... and surviving was no longer just a struggle to eat.
The Neos--agents of the anti-Christ--sought all Christians. They wanted them to conform, to take the mark of the beast. When a believer refused... it was their final act of defiance.
While the rest of the world celebrated the establishment of the "new world order," the believers fought to live, to exist. They never could have imagined just how bad things would get. And betrayal was their worst enemy.
And then they were no longer fighting. They were storming the very gates of Hell.