Thank you for your answer Razorannie.
2 groups - Yes, the Jews and Gentiles of that day. The Jews and Gentiles were not 'friends' The Jews had been tought and had grown up knowing the One God. Gentiles had pagan beliefs. They didn't believe in or know God and didn't know of God's promise or His blessings.
The Jews knew these things but didn't know a 'relationship' with Him. Now as believers in Jesus Christ, both groups were united in love and in a close relationship through Christ.
What brought them together? I gues I answered that. Jesus. They could overcome their differences by their most important belief in Jesus Christ.
Different groups of believers Right again Razorannie. It's too bad that so many times the denominations focus on their different styles of worship and many insignificant things, instead of the one thing that brings everyone together. Jesus, New Life, Salvation
The only thing that counts is Jesus, He died on the cross, Saved the world, arose from the dead, gave us eternal life.