dermdoc said:
And I have a hard time understanding believing in good supernatural(God) and not believing in bad supernatural(Satan and demons).
Not sure if this is a question specifically for Christians, but I can tell you from my (atheistic) perspective. One of the justifications Christians give for their belief in God is due to the (perceived) necessity of a first cause. Though I don't agree with the argument, it resonates with me. I can understand why people believe that there needs to be a first cause, and Christians endow God with the requisite qualities to fill that role. So the belief in God is philosophically justified that way. On the other hand, when it comes to demons I have heard no such philosophical argument. It seems entirely fabricated, not flowing from something people think is a logical necessity. This is why the belief in God seems a little easier for me to swallow than a belief in demons.