William Burkitt on Romans 11:32

That is, "Almighty God hath in wisdom and righteousness suffered both Jews and Gentiles successively, for some time, to remain under the power of unbelief and disobedience, that so he might in his own time fulfil the great counsel of his goodness, in showing undeserved mercy unto all, both Jew and Gentile."

Now from all the foregoing arguments, for the calling of the Jews, summed up together in this chapter, we may collect and gather, that the conversion of the Jewish nation to the Christian faith, has good foundation in the holy scriptures, and has been the received doctrine of the church of Christ in all ages of the church.