If a group of People claim they are one of the lost 12 tribes of Israel what do you think the criteria is for them to make that claim?
I laugh and tell them to contact Israel. It isn't my profession to prove or disprove their claims. I can only say that I am skeptical when people go around claiming to be a member of the lost tribes. But if you must ask, I'm willing to accept Israel's word on that. They have the greatest interest in that. I may be descended from Jews, but I'm not Jewish, and don't have any vested interest in Israel, except as an American.
But what does it matter to you Missyme?