Yes... Correct... Not the gentiles. These are all Jewish believers who have been scattered about this world of ours. For many Jewish Christian believers, including Lehman Strauss, the options were to join gentile denominational churches. I believe in the seven churches came about as congregations...
Ephesus - Messianic - Beginning with the Apostle to the Circumcision, Peter. A truly Jewish congregation.
Smyrna - Martyr - Beginning with the Apostle to the Un-Circumcision, Paul
Pergamos - Orthodoxy formed in this time... Pergos is a tower... Needed in the dark ages
Thyatira - Catholicism formed in this time - The spirit of Jezebel is to control and to dominate.
Sardis - Protestantism formed in this time- A sardius is a gem - elegant yet hard and rigid
Philadelphia - Wesleyism formed in this time - To be sanctioned is to acquire it with love.
Laodicea - Charismatic movement formed in this time - Beginning with DL Moody, the first to make money off of ministry
For many Jewish Christians the option was for the gentile church. I have no Jewish friends, have never met a Jewish Christian, and do not know any of the Jewish faith. But it would have been a joy to have meet one of them, especially of the Messianic congregation. I also would have loved to have had conversation with Lehman Strauss.