How about letting True Jews say who is a True Jew?
A True Jew is a Jew who is A) Born of a Jewish Mother and B) Holds fast to the Torah, writings and prophets, passed down from Moses to now.
Gentile Christians should not hold fast to being the seed of Abraham but Noah. Noah was given a covenant for all mankind. Abraham, Issac and Jacob etc...were given the covenant for Jews.
I understand that there will be many who have a problem with that, Scripture being optional and all, but there it is.
It'll be interesting to see if anyone actually is able to Biblically dispute the article.