Ephesians 2:15-16 by abolishing the law of commandments expressed in ordinances, that he might create in himself one new man in place of the two, so making peace, and might reconcile us both to God in one body through the cross, thereby killing the hostility.
One of the amazing effects of Christ’s work on the cross to save us is the unity that comes through reconciliation. He didn’t just die for me and He didn’t just die for you, He died for us and He prayed before His work was completed that we would be united (John 17:21). He accomplished what He set out to do, and that included bringing us all under the banner of Christ.
The initial work was to unite Jews and Gentiles, but today there are continued effects in that people of different backgrounds and denominations can still be intimately united by the gospel as we’ve all been reconciled to God and to each other. Jesus didn’t just earn us peace with God, but also peace with our fellow believers.
We don’t always see this in practice, but it grieves the heart of God to see His people fighting amongst each other. He didn’t reconcile us to himself and adopt us all into His family so we could fight like we’re enemies instead of brothers and sisters. It’s ok to disagree, but it’s not ok to disregard what God intended to unite us.