“your seed.” Which includes way more than Jews. Basically the whole Arabic world and through the other tribes like Manasseh, Ephraim, and Dan his seed has blessed the Western world. Jews are just one branch of the seed of Abraham. That’s why his name means “father.” Many nations can trace their origin to Abraham from Ireland to Ancient Troy to Edom to Arabia. Not just the Jews. Check out my We Wuz Kangs thread.
It's also not clear to me that "seed" itself is to be understood as a purely genetic statement in the first place. It's very much a reading gentiles got from Liberal indoctrination, where faith and ancestry are viewed as decoupled, which it hasn't been for most of history.
No Jew/Israelite was formally considered part of the community without circumcision. Sure, most of them were tribally affiliated, but so was everybody else at the time, and why would anybody leave his tribe in ancient times and join a tribe were you have to cut your genitals and make amend for your sins all the time? The maternal-line-thing comes from a post-Christian Talmud view, so it's neither here nor there anyway. Jews just initiated their children at a young age, as did most cultures back then.
Likewise, Orthodox Christians practice infant baptism. Orthodoxy is coupled with ancestry, because we baptize our children and raise them in the faith. So there's clearly an ethnic/ancestral element to it. But if holiness were transferred via ancestry, then both baptism and circumcision would become obsolete.
Even if modern Talmudic Jews had more claim to genetic continuity with the ancient Israelites than all the other Levantine peoples, which definitely isn't the case, it wouldn't serve as a justification in any way.
One of the -if not
the- core message of the Bible is that only following God in the proper manner justifies. Cain was as much of an heir to God's promises as Abel, but he fell away. Job wasn't an Israelite by ancestry, but God chose him specifically to emphasize the point about the faith, and because, in his wisdom, he viewed him as a holy man. Religious Jews sometimes semi-admit that that's how it actually works when they want to sound profound, but then they regress into the Pharisaic ancestor cult. They buy their way out of it with their neoplatonist "Jewish soul" concept, that makes mentally weak shabbes goyim like Jordan Peterson cry.
Race and ancestry are facts of life that are taken for granted in the Bible from Babel onwards, but I've never been aware of any extraordinary spiritual significance to it outside of a prophetic one. And even in prophetically significant bloodlines, there doesn't seem to be an exception to God's justice that is handed down.
