“Many Christians share at least some Jewish heritage (I do), but most American Christians are Gentiles. Most of us are the descendants of pagans, not Israelites. Centuries ago, our ancestors worshiped Zeus or Thor, natural or ancestral deities. We were outside the covenant-strangers and aliens to God. The promise to Abraham that “all peoples on earth will be blessed through you” was our sole hope. We are sons of Abraham, sons and daughters of the covenant, through the grace of God that reaches out to the lost.
A funny thing happens to churchgoers in America. It begins to seem obvious to us that we are Christians. It seems like our birthright…most of us need to remember that we are Gentiles, not Israelites-outsiders, not insiders. The God of Israel is our God, even though we are German, English, French, Dutch, African, Irish, and Russian. Therefore we should still marvel at this grace. If we marvel, if we give thanks that we are included in the family of God, then we will include others and give thanks for the presence of them as well.
The Christmas season, along with Easter, certainly affords us an opportunity to welcome outsiders into our church. It is tempting to joke about, to mock, even to scorn the “Christmas and Easter Christians.” But why? In ourselves, none of us is a whit more spiritual or sincere than they. We should welcome all who stand outside the covenant, for the Lord alls outsiders to himself.”
-Daniel M. Doriani, The Incarnation in the Gospels