When you assert something to be scientific truth, you are required to bring proof to the table. Further, your results need to be reproducable by people who don’t believe in your theory.
When you state that you believe in something, you do not need to back it up by proof. Further, your results may only be available to those who share your belief.
We do science a disservice when we ask people to believe in it. Similary, we do belief a disservice by holding it to scientific standards.
Science and belief can co-exist in perfect harmony. The problem arises when we try to pass off one as the other.