Unity vs Division

I heard a talk recently (I think it was by M. Russell Ballard), and the main point I took away from that talk is that we should focus more on the larger identities that unify us than the smaller identities that divide us. For example, being an American is more important than being a Republican or Democrat, being a human being is more important than being an American, and being a Child of God is more important than anything else. Sure, we could divide ourselves into increasingly narrow and exclusive groups and form bitter rivalries with members of other groups, and we often do, but it would be better to focus on the traits we all have in common so we can better relate to each other and work together better. We don't need to divide ourselves from each other according to race, gender, orientation, political persuasion, or socioeconomic class. Instead, we can find common ground as human beings and children of God and work together instead of driving each other apart.