The Worldwide Church of God has repudiated the "Anglo-Saxons are Israelites" theory. From their website:
"Today, after having carefully researched the tenets and history of its belief that the United States and Britain are the descendants of the ancient Israelite tribes of Manasseh and Ephraim, the Worldwide Church of God no longer teaches this doctrine. While it may be an interesting theory, there is simply a lack of credible evidence, either in the biblical account or the historical record, to support a conclusion regarding the modern identity of the lost ten tribes of Israel. We recognize that there were hermeneutical and historical inaccuracies in the Church's past understanding of this issue."
Historical - 20,000 Assyrian tablets, native stone inscriptions and cylinders.
Biblical - Hosea 1:10,11.
Though I have to say, I'm glad they dissavow it. They are ignorant on much else, it should be no suprise they are ignorant about this, too.
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