“Who is Israel?”
Is it even possible for someone to know for sure if they are descended from the original 12 tribes? Are there records?
Or is it the practice of the religion itself that matters to determine membership? If so, there are very few. And isn’t the Temple required?
And why does the question in this article even matter, given the New Covenant?
Funny, isn’t it? Non-Jews (like you?) identify and persecute and murder Jews regardless of if they “know for sure”.