Suppose you had been a Christian believer in the mid-first century. Suppose you were observing Christmas and the birth of Jesus the Savior in whatever way the earliest church celebrated that season. But suppose that in the midst of marking Jesus' advent, you ran into a Jewish couple who trembled with rage at the very mention of this Jesus whose birth Christmas marks. Suppose further that upon inquiring what accounted for their vitriol and disdain, you discov…