If someone genuinly belives the tennants of the Jedi religion then it is a bonafide one.... of course, George Lucas (founder and creatior of the jedi religion) based the Jedi on the historical Samuri and their code and faith. He was greatly influanced by Akira kurosawa, a Japanese Film directory of legendary talant.
It works for Scientology too . . . and they are extremely bonafide.