Actually, Christ's protected linage from the Adam and Eve was through the tribes of Judah AND Levi... This 'Jewish' label comes from the willingly ignorant. There were 12 tribes ... Judah was the 'king' line and Levi was the 'priest' line.
After king Solomon's reign, the 12 tribes had themselves a civil war, wherein those 'lost' tribes of the house of Israel, Christ commanded his disciples to go to but.. haven't a clue who they literally are ... but the Heavenly Father knows...
So, is it your opinion that Paul was just misunderstanding the commission when he went to Spain and Italy and preached to those who were not associated with the lost tribes?
Or do you think he thought they were from the lost tribes even though they didn’t think they were?