I ask then, did they stumble so as to fall beyond recovery? Certainly not! However, because of their trespass, salvation has come to the Gentiles to make Israel jealous.
11. Have they stumbled, etc. You will be greatly hindered in understanding this argument, except you take notice, that the Apostle speaks sometimes of the whole nation of the Jews, and sometimes of single individuals; for hence arises the diversity, that onewhile he speaks of the Jews as being banished from the kingdom of God, cut off from the tree and precipitated by God’s judgment...
The apostle proposes here a plausible objection, which might be urged against the divine conduct in casting off the Jewish nation (Rom 11:1): "Hath God cast away his people? Is the rejection total and final? Are they all abandoned to wrath and ruin, and that eternal?
Commenting on Romans 11:1-32
I say then, have they stumbled that they should fall?.... This is an objection, which the apostle takes from the mouth of an adversary; and the purport of it is, you say that the people of the Jews being blind, have stumbled at Christ and his Gospel, as was prophesied of them, and to which they were appointed; pray what were God's view and end in this?