That sounds exactly like the fallacious argument of [False equivalence](https://en.wikipedia.org/wiki/False_equivalence) so maybe you should read up on it. The argument for communism/Marxism not being done right or not real communism/Marxism is just a new version of "No True Scotsman" and is a fallacious argument because it ignores the core values of each variety of the variants and focuses on trivial differences. The argument of not real Islam ignores the fact that all variants of Islam have the same core values and use the same Koran and related writings as a basis for their ideology with minor differences. The argument "not real Christianity" is actually not so much a fallacious argument as the two aforementioned examples because in point of fact, the religion of Catholicism diverges strongly from scripture and much like Judaism diverges widely from biblical teachings. The other major Christian religions have returned partially to biblical teachings but still follow somewhat more loosely the ideology of Catholicism since these branches of Christianity arose out of the Catholic Church. However, because of your ignorance on the topic you've chosen to apply the false equivalence argument to the Messianic Jewish faith. Orthodox Judaism derives it's ideology from the Talmud. We all know this, they admit it and embrace the Talmud writings. We agree on this alone. Messianic Judaism completely rejects the Talmud as deceitful twisted thinking and a rationalization of depravity and upside down logic that calls good evil and evil good. Messianic Judaism and Modern main stream Judaism are as far apart as Karl Marx and George Washington, as far apart as the Constitution and Communist Manifesto.