Yes, I mean believing in that type of thing’s just crazy! People should confine themselves to believing in smart things, like god talking to them as a cloud or a burning bush, the entire world’s ecosystem being transported in a wooden boat, the world being flooded for forty days, women being turned into salt or giving birth at the age of one hundred, men able to turn water into wine by the touch of their hands, walk on water, cure leprosy and the blind and raise the dead. They should believe that saying a few magical words will turn wine and stale bread into the blood and flesh of a man who died centuries ago... etc.
Scientology was founded in 1953 and now has somewhere between 100,000 and 200,000 people worldwide. Sixty years after the death of Jesus, Christianity would have been lucky to number over 10,000 and had only just managed to define itself as a separate religion from Judaism.
More recently, the Seventh Day Adventists were founded in the 1860s and sixty years later still only had a few thousand members. They now number 16,000,000 and are one of the fastest growing religions in the world. (Not bad for a religion who’s early prophets predicted the world would have ended by now.)
Scientology has the significant advantage for growth in that it was founded in an era when mass communication and travel already existed. Its great disadvantages are that there are already several major religions that are well entrenched. It has not been adopted as the state religion of any dictatorship that was willing to use the gun to enforce conversions to the new faith; something that each previous major religion has, at one time or another done.