> Rom 11:23 And they also, if they abide not
> still in unbelief, shall be graffed in: for God > is able to graff them in again.

> Which shows clearly that indeed if Israel at
> some future date does not abide in unbelief,
> will be graffed in.

The word "they" in that verse does not at all refer to the nation "Israel" as you seem to imply, but to "some of the (natural) branches". In other words individual people.

Even now, any individual who no longer abides in unbelief, in other words who believes, can easily be grafted in.

It has nothing whatsoever to do with any "future" restoration of the nation to God's kingdom.

It is for now, and it only happens at the personal individual level.

The cut off branches can be grafted back in whenever they want to, all they have to do is believe.

No "nation" ever got saved.
Only people can get saved.

Ro 11:17 And if some of the branches be broken off, and thou, being a wild olive tree, wert graffed in among them, and with them (the natural branches) partakest of the root (God) and fatness of the olive tree (God's kingdom); 18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee. 19 Thou wilt say then, The branches were broken off, that I might be graffed in. 20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear: 21 For if God spared not the natural branches, take heed lest he also spare not thee. 22 Behold therefore the goodness and severity of God: on them (branches) which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off. 23 And they also (the fallen branches), if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.