And you'd better remember the Sabbath day to keep it holy. But that's not what he said. It didn't bother Paul that Christians couldn't agree on some important things. Didn't bother Paul at all. Either we are supposed to observe Sabbath, or we are not.
Somebody has to be right, and somebody has to be wrong.
You must follow the convictions of your heart. But let your brothers and sisters do the same. They don't have to do things your way. Don't assume that you know what God wants them to do. Don't try to be their conscience.