Why does it seem that the crazier/angrier the Christian, the more followers they have?

Appropriately you used the word "seem." The actual numbers of their followers are few. Their intention more than anything seems to be to get attention. And it seems it is working very well. They got your attention, did they not? Myself, I have little time to pay attention to them. I'll let you track them and let you keep me informed. If I have time to devote to your update, that is. I'm usually too busy building God's Kingdom on Earth and helping bring about understanding and world peace to bother with such nonsense.