An appalling interpretation of Romans 11.
Grafting in actually means grafted into Christ.
Grafting out means severed from Christ.
That is why Paul said earlier.
Romans 11:7-10
What then? What Israel is seeking, it has not obtained, but those who were chosen obtained it, and the rest were hardened; just as it is written: “God gave them a spirit of stupor, eyes to see not and ears to hear not, down to this very day.” And David says, “May their table become a snare and a trap, and a stumbling block and a retribution to them. May their eyes be darkened to see not, and bend their backs continually.”
Sure doesn't sound like a lack of a blessing.