The common denominator to accepting literally any type of religious doctrine is the belief that something is inherently wrong with you. One must foundation themselves on this: "I am a bad person, and I need something from outside me to save me from myself."
This is a relatively easy sell, because everyone is capable of committing evil, and everyone has at one point in time made mistakes and wrong decisions. The reason why this is a dangerous first step to take in the critical thinking process is because it ultimately removes the individual from being personally responsible for themselves. One becomes a victim to forces outside his/her control as opposed to their own doing.