What it means to call Jesus “Lord” has been a big bone of contention over the last decade or so. I have had a lot to say on the matter here, there, etc., and on Facebook recently. Many people are convinced by a syllogistic Trinitarian logic: YHWH = Lord, Jesus = Lord, therefore Jesus = YHWH. Others, myself included, think that Jesus is confessed as “Lord” because the authority entailed in lordship has been graciously bestowed upon him by God (cf. Phil. 2:9-11).
This latter ante-Trinitarian line of thought can be made to serve different theological agendas. My own view is that it is not an argument against Trinitarianism (that is, anti-Trinitarian). It is an argument for a narrative-historical reading of the New Testament that foregrounds the kingdom-political significance of Jesus in the first century context. This is not the whole story, but it is by far the most important narrative thread in the New Testament, running from the announcement to Mary that her son would receive the “throne of his father David” (Lk. 1:32) through to the fall of Babylon the great in Revelation 18-19. I think it needs to be better understood—at the expense of the classic Trinitarian paradigm if necessary.