Did the magic made you believe in Satan and God both ?
Satan is just a specific form of Leviathan (God). So to answer your question, I actually believed in first Satanism, then spirits, then magic, then God. I found that Satanism was the most appealing and correct religion for me, then I had an experience with demons, then I started to practice magic, then I came to realize that Satan is a subset of God.
May I ask, why you do practice magic (for earning money, for your personnal life ect ?)
Do you make nightmares ?
I don't see why I would give nightmares to people, though that is in interesting idea. I mostly practice magic to just have a connection with the things around me and with my inner-self, but mostly I use magic to help myself grow emotionally and spiritually. Sometimes I also use magic to help me get money as I really need it, being unemployed and all. I hardly see that as bad though since I really need it just to get by.
A couple times though I have tried to hurt people with magic, but it really didn't work. Most of my success seems to be with magic that just helps me in some way, either emotionally or materially. Though I used to deal with spirits a lot more than I do now.
What do you believe about what said Jesus about the demons ?
Do you think it's possible ? Do you think it can hurt a lot someone ?
I don't believe what he said. A d(a)emon in ancient times was like a guardian or teacher spirit that would help people or give them advice. A few were violent, but that was just a few. I think that demons can hurt people, but not in any physically serious way for the most part. I also think that demons hurting people is uncommon. Actually, most demons just ignore people in general.