Jesus told the truth and was crucified, Harold Camping lies and gains more followers, why?

I am fed up with Harold Camping and his date setting for the rapture. Every time he sets a new date it comes and goes and he is proven yet once again to be a liar and a false Prophet. Why do you think it is that the number of his followers grows every time he tells a lie or teaches a false doctrine? If I was a betting man I can guarantee you that Camping nor any of the other date setters would take my million dollar bet that they are wrong.