I suspect God would disagree that his morals change.First of all, every human was gifted with consciousness. Buy I agree, not everything depends on it. Because what is acceptable in a certain time in a certain society may be unacceptable in some other time and place.So the question then becomes where did you get your understanding of what good is and why do you expect everyone to know it?
Basically, the word of God should be a beacon to universal morality.