See, that's the thing about interpreting the Bible literally; all that action movie shit at the end just reads like another thing that God himself said, so it must be true. That Jesus will return after a massive global conflict has been the thinking of huge numbers of Evangelicals for as long as that label has existed, and rather than propel them into a pit of ennui and despair, the idea filled them with purpose. If their years of faith were to pay off, an Armageddon-level war that finally prompts Jesus to hit us back must happen.
So what do a bunch of Christians who believed the Bible a little too hard back in your grandparents' day have to do with the world going to war today? Everything, because they've never gone away, they've only gotten stronger. The "enemies of God" who need to be destroyed ...
Fuck you, Ivan Drago!
... and the signs that the battle is imminent (the sinking of the Titanic was seen by some as proof that God would destroy the world soon) have varied wildly over the years, but it's all been tied to the belief that one gigantic, final war has to take place for everything to play out as promised in the Bible.
After all, you still hear the word "Evangelical" all the time, right? That's because some really powerful people over the years have counted themselves among the believers -- most notably, conservative Republican superhero Ronald Reagan. In 1971, he reportedly told California State Senator James Mills that the "fire and brimstone" mentioned in Revelations referred to the nuclear weapons that would destroy Russia, who played the role of "enemies of God" at the time.
It also came up repeatedly during his 1984 reelection campaign. Two investigative journalists published evidence of Reagan's obsession with Armageddon doctrine in the Washington Post that year. A radio documentary, "Ronald Reagan And The Prophecy Of Armageddon," appeared on 175 public radio stations. Because this was a time when we still asked questions about the things that were bothering us, it even came up in a televised debate with Walter Mondale.