Read Ephesians 2:11-18
Together as one body, Christ reconciled both [Jews and Gentiles] to God by means of his death on the cross, and our hostility toward each other was put to death. Ephesians 2:16 (NLT)
Even today in the Church there is hostility between people of different denominations, even different churches. While the importance of doctrine cannot be denied, doctrinal differences should never keep us from recognizing God’s work in others, and praying for them rather than denouncing them.