I do hope you are not of the replacement theology persuasion. Yes Abraham’s blessings do carry forward through the cbosen lineage, blessings are passed onto the firstborn.
Exodus 4:22 Then you shall say to Pharaoh, ‘Thus says the Lord, Israel is my firstborn son,
Were it not for the Jews we would not have the Christ!...and we’d all be doomed!
Irrelevant. The subject of that verse is the Seed of Abraham, which is confirmed multiple times to be Jesus Christ. Not the tribe of Judah, not the modern secular state of Israel, which was not the kingdom of the Judahites to begin with.