Ephesians 2:14

We have now come to the last part of the chapter, which contains an account of the great and mighty privileges that converted Jews and Gentiles both receive from Christ. The apostle here shows that those who were in a state of enmity are reconciled. Between the Jews and the Gentiles there had been a great enmity; so there is between God and every unregenerate man. Now Jesus Christ is our peace, Eph 2:14. He made peace by the sacrifice of himself; and came to reconcile, 1. Jews and Gentiles to each other. He made both one, by reconciling these two divisions of men, who were wont to malign, to hate, and to reproach each other before. He broke down the middle wall of partition, the ceremonial law, that made the great feud, and was the badge of the Jews' peculiarity, called the partition-wall by way of allusion to the partition in the temple, which separated the court of the Gentiles from that into which the Jews only had liberty to enter. Thus he abolished in his flesh the enmity, Eph 2:15. By his sufferings in the flesh, to took away the binding power of the ceremonial law (so removing that cause of enmity and distance between them), which is here called the law of commandments contained in ordinances, because it enjoined a multitude of external rites and ceremonies, and consisted of many institutions and appointments about the outward parts of divine worship.

— Matthew Henry's Concise Commentary (public domain)

he--Greek, "Himself" alone, pre-eminently, and none else. Emphatical. our peace--not merely "Peacemaker," but "Himself" the price of our (Jews' and Gentiles' alike) peace with God, and so the bond of union between "both" in God. He took both into Himself, and reconciled them, united, to God, by His assuming our nature and our penal and legal liabilities (Eph 2:15; Isa 9:5-6; Isa 53:5; Mic 5:5; Col 1:20). His title, "Shiloh," means the same (Gen 49:10). the middle wall of partition--Greek, ". . . of the partition" or "fence"; the middle wall which parted Jew and Gentile. There was a balustrade of stone which separated the court of the Gentiles from the holy place, which it was death for a Gentile to pass. But this, though incidentally alluded to, was but a symbol of the partition itself, namely, "the enmity" between "both" and God (Eph 2:15), the real cause of separation from God, and so the mediate cause of their separation from one another. Hence there was a twofold wall of partition, one the inner wall, severing the Jewish people from entrance to the holy part of the temple where the priests officiated, the other the outer wall, separating the Gentile proselytes from access to the court of the Jews (compare Eze 44:7; Act 21:28).

— Jamieson-Fausset-Brown Commentary (public domain)