Differences. We readily notice differences.
And we make judgments about the differences that we notice, assigning value to our preferences.
Consequently, the people of the world are divided into strangers, friends, aliens, and enemies.
What I understand about scripture is this division is not God's intention.
The epistle lesson for today, the Eighth Sunday after Pentecost, Ephesians 2:11-22 addresses this separation: "With his body, he broke down the barrier of hatred that divided us. He canceled the detailed rules of the Law so that he could create one new person out of the two groups, making peace....So now you are no longer strangers and aliens. Rather, you are fellow citizens with God's people, and you belong to God's household."
God's household is larger than most of us imagine.