I fear it's because religion is man's attempt to reach God, and when he feels he has succeeded, he cannot abide anyone else's claim to have done the same.
I put off writing the first Left Behind book for a year because I got invited to assist Billy Graham in his memoirs, and had we known what we were putting off for a year, we might not have put it off.
I've written enough books with real celebrities, such as Walter Payton and Hank Aaron and Billy Graham, to know that fame looks good only to people who don't have it.
In the prequel we're going to tell about the characters before Left Behind, and the book would end with the rapture instead of start with the rapture like the first one did.
It's made me more expectant of the imminent return of Jesus, and also more sensitive to the people around me. Knowing Jesus will return soon makes me want all the more to tell people about him and all that he offers.
SOON was the first novel where I used a rough outline. Usually I have characters and an idea and write as a process of discovery. Like working without a net.
Tim sends me a fairly ambitious workup in notebook form noting the passages we're going to cover and the chronology of the biblical events, and his commentaries on those things he's read and written.
There is a comfort zone of knowing where things are going and having characters in place, but the action gets more and more dramatic and is very challenging to describe.