The entirety of the modern Christian faith is that god said one thing to one group and then changed it. This is not to get into the debate of authenticity or logic of religion or anything like that, it’s simply how it’s always been. God said only the Jews get to be my people. Then it was everyone who believes. God said no unclean meats. The he said the meats were fine. It’s the nature of the Christian faith. If you include the Mormons, there’s more changes, but I don’t know them.

Within the faith, it’s accepted as basically a change in the promises god made to humanity. And if we look at it giving them some leeway, why can’t he change it again?