The religion created by the minor Science Fiction writer, L. Ron Hubbard in 1952. Scientology teaches that you are an immortal "thetan" that is entrapped in the physical universe and your own problems by your thoughts (considerations and postulates). In practice, Scientology is the exact opposite of what it teaches. It claims to free you, but most people would say that Scientologists are brainwashed and enslaved. It claims to promote freedom of speech, but Scientology sues anyone who says anything bad about Scientology. It claims to want to improve the earth, but sues anyone who tries to use it's books and techniques without paying a license. It is a very schizophrenic and dangerous organization whose members actually infiltrated and spied on the U.S. government in the biggest ever case of its type in U.S. history.
If Scientology got big, the people who get in their way would be killed.