Believing in evil without believing in god (or Christ) is scary, because then the source of evil must be people, rather than a Satan. Many people are incapable to accepting this, so they adopt religions that pin "evil" on forces that are out of their control.
Well, it seems to me a person can believe in evil without running to become a follower of Christ. It's ok. Take your time. This is big.
Believing in evil without believing in god (or Christ) is scary, because then the source of evil must be people, rather than a Satan. Many people are incapable to accepting this, so they adopt religions that pin "evil" on forces that are out of their control.