Psychological observation on doomsday 'faith'

In view of the facts that (1) Harold Camping made a wrong doomsday 'prediction'' before in 1994 and (2) Harold Camping was surely not the first person who made wrong 'prediction' of such nature, the question is why there were still people' who believed in his talks so feverishly ? The Right Nation' - Conservative Power in America, written by British journalists John Micklethwait and Adrian Wooldridge, 'may contribute to' deeper understanding of the ideational and environmental factors. America' s leading atheist Sam Harris' fairly thought-provoking books also provide some statistical facts and figures on this great question. To be sure, it must be stated that not all Christians read the Bible so literally and 'scientifically' as Camping and his follower did 4 days ago.