As a Christian (Catholic to be specific) myself, I would like to tell you what a moron you are.
True Christian beliefs say that you can find God in many ways, including through other religions. I remember in confirmation classes, one of my teachers and her daughter, who was a student in the class, tried to tell me and a friend that the Catholic faith states that anyone who isn't Catholic goes to hell. I argued with them about it for the entire class, and apparently somebody told the administration of the church about it, because she was no longer the teacher the week after that, and the lady who organizes the program came in to talk to all the classes in a big meeting to adress that specific subject. Catholisism as well as other Christian religions believe that anybody who is trying to find God can do so, no matter what their specific customs of going about that may be. Christians believe that you can find God whether you are Catholic, Lutheran, Jewish, Buhdist, or whatever you may be.
Non believers are not considered Satanists either. As a matter of fact, there is a specific prayer that this lady told us about that is said at one specific mass every year where we pray for everybody who is searching for God in any way, as well as those who are atheist. They are no less human than the rest of us, and are no worse sinners than people who go to mass every Sunday. They do not worship Satan because they don't believe in God, because Satan is a Christian belief. God is good, Satan is evil. If you believe in one, that implies that you believe in the other. Atheists do not believe in a higher power of any sort. They do not believe in a God, and they do not believe in a Satan, so how would they worship the latter?
I'm not a real crazy into religion, but I was raised Catholic since day 1, so I know how things work with that, and you are most certainly talking out of your ass. Cut it out.