Are Gentiles Excluded From God's Covenant?

In the old testament they did have to take on these dietary laws and be circumcised. But in the new testament, when it talks about the acceptance of god's,. ofg of god's acceptance of the gentiles, they still are required to follow the same marriage and sex laws that are constant between the old and the new covenants. Ba: There is a sexual ethic that people are being included into and to follow. That seems like a really clear point... i think there's aspects of this parallel that are good and true.