Few Christians actually read the Bible in the early days of the religion. Priests handled all of that. For one thing, Bibles were in Greek or Latin. Also, books were god-awful expensive, and hardly anyone except the wealthy could afford them. Churches, if they had a Bible at all, had only one, which the priest read and then conveyed to his flock. And, there was just one official interpretation for everything in the Bible.
Much of the Old Testament law was considered obsolete with the coming of Jesus. However, whenever the Church desired to burn a witch or stone a homosexual, the old laws would be dragged out and dusted off.
It was not until the Reformation that common people started to read the Bible. Suddenly, everyone and his brother had their own interpretation of what the book meant. Since virtually anything between its covers can be read numerous ways, all bets were off! That's one of the keys to Christianity's success--it's so malleable that it can be twisted to whatever purpose one wishes.