I wish I could meet face to face with the people who originally made each religion. That would help clear things up, but that unfortunately is unable to happen at the moment lol :3
Have you ever thought about what their real extent of knowledge was? We are basing the future of men and groups of men who had to explain what they were quite ignorant of. Ignorance can beget ignorance along with all the other flaws men have until we enlighten ourselves.
Religion is a prison...No, not at all. If you truly believe and take your belief into your heart, mind and soul, it is freedom beyond compare. You become no longer interested in the things you consider a prison for the Father is so expansive, pure love, kindness and forgiving. But you have to really believe and desire to learn more of God. It opens "doors" you never really conceived of. It does take effort and sincereity though.