Obsession with the end times stems from a particular Biblical interpretation called "dispensationalism" that was introduced into America in the 1800s. If you're wondering why certain Christian sects became more obsessed from retreating from society than improving it, these are the head waters. It's a successful theme that took off on radio, then with televangelists, and now on social media.
The New Apostolic Reformation is kind of the ultimate culmination of these beliefs. It's one of the key components of what is being called Christian Nationalism.
It's not even clear what parts of the movement are earnestly held and which are purely opportunists trading on the fears of the naive. Many Christians may cross-pollinate in these circles without knowing it - but it takes a very specifically indoctrinated person to think Trump is divinely anointed