Isn't that like saying that Gad tribe who never crossed the river Jordan and still considered a part of Israel? It is a yes and no answer....
James, a servant of God and of the Lord Jesus Christ, to the twelve
tribes which are
scattered abroad, greeting. -
James 1:1
I believe that...
The Apostle Paul - Was the Apostle to the uncircumcision
The other Apostles - Were the Apostles to the circumcision
7 But contrariwise, when they saw that the gospel of the uncircumcision was committed unto me, as the gospel of the circumcision was unto Peter;
8 (For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles
9 And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we should go unto the heathen, and they unto the circumcision.
10 Only they would that we should remember the poor; the same which I also was forward to do. - Galatians 2
James was an apostle to the circumcision, when he began his epistle he began it to the twelve tribes which are scattered abroad.
I believe that the Messianic is a scattered flock. I do not believe that you can go to each Messianic church and find everything the same. But who knows if things will form into a more denominational type setting... But... Is that what you want?
Dr Lehmon Strauss got his start way back in the 1920s... The Messianic church, which began in the 1960s, was not an option for him at that time. So, there was no river of Jordan for him to forge.