Christian fundamentalists don't believe there is anything one could do to hasten Armaggedon.

Some do. My mother was a fundamentalist in her later years. She very much believed that there were certain things that needed to be done, politically, in order to create the conditions that would bring about armageddon, and her voting patterns reflected that belief. I have other relatives who believe this way also. And I've heard plenty of fundamentalists preaching along these lines on Christian radio as well.