> He said that he learned their ultimate goal has nothing to do with our culture or freedom. They believe armageddon is coming, that it is literaly going to be a big battle in a particular town in Syria near the Turkish border, and that the West is the enemy (descendants of the Roman empire) that their Moslem army must defeat.

While I don't doubt that that is what was revealed to him while he was captive, I will note that there are three potentially very different things that that could be, that can be very hard to distinguish:

1) The actual goals of the Daesh leadership,

2) The propaganda the Daesh leadership uses to motivate its foot soldiers,

3) Deliberate fabrications presented by captors to captives for propaganda, misinformation, or other purposes.