People are motivated by personal idiosyncrasies and cultural mores. Whether you focus on the whole or the part is dependent on your cultural and individual perspective. Morality is in the eyes of the beholder. Morality is whatever a culture or individual says it is. Morality is relative to changing circumstances, so of course it changes.
Moral diversity is inescapable and shows morality's intrinsic relativity.
Conformity exists when it is enforced within a given system. Moral truth is relative, so of course there's disagreement. We value detached analysis and perspective. Doubt is inevitable in any thinking person confronted with relative moralities. If you need to belong, your group's morality will have a lot of leverage in your life.