For you, brothers, became imitators of the churches of God in Christ Jesus that are in Judea. For you suffered the same things from your own countrymen as they did from the Jews, (1 Thessalonians 2:14 - ESV)
Paul is again pointing out the way they have imitated someone else, who was imitating Christ. First he mentioned this in chapter one, when he pointed out that they were imitating Paul, Silas, and Timothy ... who were imitating Jesus. Now he says that they were imitating the churches in Judea, who were imitating Jesus.