Here is a reference to a Statement of Faith (SoF) of a Messianic group of the type I would call as being one house two covenant. I took the liberty to show only excerpts and to underlined parts to emphasis my point. There are three parts of the SoF document that I have numbered with Roman numerals I, II and III.
The question I have is what's different from an organization that has this type of statement of faith from any typical church in America? A church whose members would say something like "they have a special place in their heart for the Jews" but the Torah would make no difference to them? I believe that if you read this article that you will conclude that there is no real difference.