The doctrine is not changed.
You know that is untrue, Peg. 200 years ago the "doctrine" was that you should treat your slaves kindly, and not beat them to death, as that got expensive. Now the same churches say that slavery is Very Wrong and forbidden by the Bible - and those Bible verses haven't changed much at all.
The same goes for killing "witches." The same goes for women having to wear hats to church when I was a child, but no longer by the time I got out of college. Heck, for the Sun going around the Earth until 1620 or so. Doctrine evolves continuously to catch up with the progress of society, Peg. Not so much the other way around....