The "lost ten tribes" evidently had no significance for James. As a matter of fact, they are no more "lost" than Judah and Benjamin. The Jews of Palestine after the destruction of Jerusalem by the Romans were once more scattered abroad, as their ancestors had been twice before, to mingle as "Jews" in various parts of the world. Doubtless, modern Jews are simply a blend of all the twelve tribes. At the time when James wrote, the Jews were very numerous in all the great commercial centers of the world, such as Alexandria, Antioch, Babylon, Ephesus, Miletus, Pergamum, Rome, Thessalonica. But it is more than probable that James has in mind chiefly the Eastern dispersion in Babylonia and Mesopotamia, as Peter (1 Peter 1:1) addressed the Western dispersion.
But was James writing to Jews who were not Christians? Was he making an appeal to the non-Christian Jews of the dispersion to become Christians? The idea is not without fascination in itself. Dr. J. H. Moulton[39] contends that this is precisely what James has done, as is shown by the avoidance of specific reference to Christ and to the cross so as not to give offense to the Jews whom he wishes to win. Dr. George Milligan[40] replies that it is not possible to think of "a Christian teacher of James's position suppressing his distinctive beliefs under any circumstances whatsoever." But the author does _not_ conceal his view of Jesus. In the very first verse he speaks of "the Lord Jesus Christ," and these words give his human name Jesus, his title Christ (Messiah), and his lordship (deity). Besides, in 2:1 James speaks of Jesus as the object of faith and so of worship, as Moffatt[41] correctly has it: "As you believe in our Lord Jesus Christ, who is the Glory." See also 5:7, "until the coming of the Lord" (cf. 5:8).
There are no doctrinal discussions of the cross and the resurrection, but all this is distinctly implied. James also announces himself as a Christian in 1:1 and could not wish to conceal the gospel if he meant to win Jews to Christ. Moreover, he draws a distinction between the Christians ("ye") and their oppressors ("they," apparently rich Jews) in 2:7: "Do not they blaspheme the honorable name, by which ye are called?" That "name" is the name of Christ.[42] Compare also 2:6: "Do not the rich oppress you, and themselves drag you before the judgment-seats?" Besides, James claims the readers as believers, "my brethren," in 2:1 and 5:7 f. There are, doubtless, passages where James pictures unbelieving Jews, as in 2:6 f. just mentioned and in particular 5:1-6, that vivid apostrophe to the rich Jews of the time.