As it was in Abraham's time, Ishmael, who was born in a mere carnal and ordinary way of generation, persecuted Isaac, by mocking at him, Genesis 21:9, who was born by virtue of the promise, and the mighty power of God, enabling Sarah at those years to conceive, and Abraham to beget a child; even so it is now, the carnal seed of Abraham, the Jews, persecute the Christians, which are his spiritual seed. From whence we may observe, that the Holy Ghost accounteth mockings of good people for religion, persecution. So Hebrews 11:36: Others had trial of cruel mockings; and we know these were one kind of the sufferings of Christ. By this also the apostle doth both confirm what he had before said, in making Hagar a type of the Jews, and Sarah a type of the Gentiles, the Jews persecuting the seed of Christ, as Hagar's seed persecuted Isaac.
Related Commentaries of Galatians 4:29
Galatians 4:29
29 But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now.