"Shawn, " The True Believer" is an outstanding book, and one of my favorites. It's also a great reference point in consideration of this thread and many others.
My interpretation of the book is that it is about jumping on the band-wagon of ANY "cause": religion, health, politics, food, etc. aka The Fanatic. When it comes to faith, how is any one different from the other if it is accepted without question or skepticism?
I can certainly understand the initial 'lust" a person feels for a new idea. Most have been there, but you have to go further than the starting gate to win the race and separate yourself from the herd...."