Reading some of your posts, it's apparent you don't really understand this doctrine.
1. Up until the new covenant any blessings or promises given by God to Israel were only applicable to physical Israelites. However, everyone understands that under the new covenant gentiles have been "grafted" into Israel:
Eph 2:11 Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
Eph 2:12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
Eph 2:13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
Gentiles, before Christ, were without hope. Strangers from God's promises. Now one DOES NOT have to be a racial Israelite to partake in God's promises. Black, white, red, green, blue...it doesn't matter. All who hold to Christ are subject to God's promises.
2. There WERE physical blessings promised to Israel. When God makes promises, he WILL honor them. He cannot lie. But these physical blessings ALSO apply to racial Israelites who just by virtue of their relationship to Abraham take part in them. Some may be horrible people, but God made promises to Abraham that MUST be fulfilled.
3. Mathematics seem to dictate that there would now be a VAST number of Israelites descended from Abraham. Many many more than simply the ones who identify themselves as "Jews" today. Diego has done an admirable job of pointing out that the bible makes it very clear that there is a difference between the tribe of Judah (Jews) and the other tribes. We KNOW that these other tribes were apart from Jews in biblical times.
4. The United States, Great Britain and many other nations have, throughout most of their history, been Christian. The United States and Great Britain seem to have fulfilled many of the physical promises given by God to Israel. I find it very likely that the vast majority of people who comprise the United States are descendants of Abraham. And I'm not talking about just whites. There's been so much interbreeding that a black can be more of a physical Israelite than some white appearing person maybe. But that doesn't even really matter because as pointed out a non-Christian that is white, black, red, green or blue may be benefactors of the physical blessings, but still be strangers from the promise of eternal life which is only given through Christ.
For more information about physical promises see God's Commitment to Abraham and his Descendents
Good luck and God bless in your studies.
Again Doug, that is the false claim. That is why there is the curse against claiming to be a Jew. You are NOT defacto entitiled to that Blessing. You don’t get it. You have a superior blessing or an inferior one (if you want to look at it so) but you (assuming you ARE born again of water and the spirit) have a DIFFERENT covenant and blessing. Period.
And this false doctrine teaches TWO EVILS:
#1 it says there are signs we are waiting for... BZZZZT! Wrong, there are no signs, He’s on his way RIGHT NOW GET YER AFFAIRS IN ORDER!
#2 you get to BE Jews and just in case yer a little too comfy in yer sin, hey, no worries, everyone is a Jew now anyway so relax!
That’ll send a whole LOT of folks to Hell... Maybe not YOU... maybe you get the big picture, but yer NOT helping the unsaved find Christ by telling them they are covered by the Covenant of Abraham, NOR are you helping Christians with their rewards by telling them to look for SIGNS FIRST!