Adam Clarke on 1 Thessalonians 2:14

Ye - became followers of the Churches of God - There is not a word here of the Church of Rome being the model after which the other Churches were to be formed; it had no such pre-eminence: this honor belonged to the Churches of Judea; it was according to them, not the Church at Rome, that the Asiatic Churches were modelled. The purest of all the apostolic Churches was that of the Thessalonians, and this was formed after the Christian Churches in Judea.

Had any pre-eminence or authority belonged to the Church of Rome, the apostle would have proposed this as a model to all those which he formed either in Judea, Asia Minor, Greece, or Italy.

Ye also have suffered - of your own countrymen - It is worthy of remark that, in almost every case, the Jews were the leaders of all persecutions against the apostles and the infant Church. And what they could not do themselves, they instigated others to do; and, by gathering together lewd fellows of the baser sort from among the Gentiles, they made frequent uproars, and especially at Thessalonica, where the opposition to the Gospel was very high, and the persecution of the Christians very hot.