Does Romans say that Gentiles are grafted into the tree(Israel)? If so, then the promises to those of the natural tree, the root, avail all the branches. You limit those blessed.
I cannot limit anything. The scripture decides.
In Romans 11 you do not appear to be considering the other parts of the tree, which I believe to be the most important parts: the firstfruit and the root. They are the holy parts, and only through them is the remainder of the tree made holy. And who are the "root?" Certainly not the Gentiles.
I found it ironic that you chose Romans 11 as a reference. That chapter is just another in a long list of references that point to the elect being from the children of Israel. This short passage plainly tells us who the elect are:
"Even so then at this present time also there is a remnant according to the election of grace. And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then it is no more grace: otherwise work is no more work. What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded." (Rom 11:5-7 KJV)
According to Paul in verses 7, the elect were the remnant. He did not say, "the non-Gentile elect hath obtained it," which would be an appropriate statement if there were both Jews and Gentiles in the elect. But there was no need for any distinction since the elect consisted of only the remnant of the children of Israel, which were parts of the natural root and natural branches.
That election of the faithful remnant closed the chapter on Israel and the old covenant. After the first resurrection in 70 AD, Jesus sat on the throne of David as he predicted in Mat 25:31; and the new covenant has been in full force since. The rest of us are no longer Jews and Gentiles, in his eyes, but potential children.
Philip