More often than not it is Messianic Gentiles who try to enforce the Torah on other believers. A messianic congregation can not and should not try to compete with the local Orthodox synagogue on the Torah. Instead a Messianic congregation should provoke them to jealousy over love and knowing God in a personal way, not a legal way. Testimony and Identity is the Key to Torah. There is an identity through the Torah.
Testimony comes by revealed action.
As a rule of thumb some Messianics really blow their testimony by picking and choosing. You will never be able to bring the message of salvation by trying to keep up with the Cohens. The Torah is totally holy, but we are under no obligation to keep it. The key is individual freedom, not corporate legislative legalism. Messianic believers must hold firm that the Brit Chadasha is a very Jewish book and the most Jewish thing that anyone could do is to follow the Jewish Messiah Yeshua.