Messianic Judaism

[Dedicated Mind]

I just finished a series of payed online lectures on Messianic theology and the main thrust of the presentation was that jewish believers in messiah should still obey the law and customs but that gentile believers were not required to. I was under the impression that messianics believed that all christians should follow the law, but that is not the case. according to paul, in I cor 7 he says:

17 But as God hath distributed to every man, as the Lord hath called every one, so let him walk. And so ordain I in all churches.
18 Is any man called being circumcised? let him not become uncircumcised. Is any called in uncircumcision? let him not be circumcised.
19 Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.
20 Let every man abide in the same calling wherein he was called.


In light of these verses, do you believe it is wrong for a gentile christian to convert to messianic judaism or do you believe that jewish christians should not be following the law?