I am not Jewish. I am a Noachide. And yes, I have read the TaNa"KH and the "new testament" (King James Version) and now, thank G-d, am able to read the Chumash in the original Hebrew.
Unfortunately, I don't know exactly what to tell you. I was a Bircher for four years and joined with the greatest of enthusiasm. I cannot tell you how hurt I was by what I found. Of course, there are still Jewish Birchers today, and they very much disagree with people like myself. To tell the truth, maybe it is good that they are there. True, they give protective coloration to the gateway to the anti-Semitic movement, but they also are in a position to influence people. I don't which is needed more--that all Jews depart the JBS or that they take it over! It is not an easy question to answer.
As for chr*stianity and its attitude toward the Jews, you must first of all realize that there is really no such thing as a single "chr*stian religion." Chr*stianity is not the name of a religion but actually of a plethora of religions, many of them bitter enemies to one another. The only thing that all the chr*stian religions have in common is a vocabulary, and the words mean very different things to different forms of chr*stianity.
The most pro-Israel and pro-Jewish chr*stians are American-style "pre-trib dispensationalist" Fundamentalist Protestants--and even these want to convert the Jews for the simple reason that they believe that every single human being (very much including themselves) is inevitably headed to eternal damnation unless they make use of the "loophole" G-d has allegedly provided by (G-d forbid!) incarnating Himself and (chas vechalilah!!!) "damning" Himself vicariously in their place. They will still support Jews and Israel to the very end--do not doubt that for one moment--but they believe in J*sus as the only antidote for otherwise inevitable damnation just as much as they believe in Israel. Their bible is a composite of the TaNa"KH and of the "new testament" and they believe both of them. Their view of the messiah is also a Jewish/chr*stian mongrelization. They believe J*sus is the messiah who died for the world but also that he will sit on a throne in Jerusalem and be the very literal king of a very literal Jewish kingdom. You won't find this belief anywhere else.
The more traditional forms of chr*stianity are strictly supersessionist. They hold that the chr*stian church (G-d forbid!) is Israel now and that all the prophecies apply only to the church.
The JBS was founded by a Unitarian who didn't take the Bible very seriously; he was a civilizationist like many "palaeoconservatives." Most JBS members, however, are chr*stians. They tend to be of two types: right wing Roman Catholics (sedevacantists or Feeneyites mostly, who tend to be extremely anti-Semitic), and Protestants who are what is known as "chr*stian reconstructionists" (to learn about this group look them up on Wikipedia; they are also called "dominionists"). These "reconstructionist" Protestants reject separation of church and state and believe that chr*stians are destined to convert and rule the entire world before the "second coming." Ironically (and this makes absolutely no sense), they believe that all "old testament" law that was not explicitly "repealed" (sic) in the "new testament" is still universally applicable, which makes them kind of Jewish--yet they are for some reason bitterly opposed to Israel and to Zionism and tend to ascribe them a leading role in "the conspiracy." Rousas J. Rushdoony (now deceased) was the father of this "reconstructionism" and his son-in-law Gary North is still very much a leader in it. And I don't know why, but they somehow associate Austrian school economics with "old testament" theonomy.
One of the leading texts of these "reconstructionists" is a book called The Rapture Cult. The book attacks not only Zionism and Israel, but also pro-Israel chr*stians. My JBS coordinators actually gave me a copy of this book to read (it was written by a Bircher as well). If you are interested, the full text is available free online. One interesting thing (and as stupid as it is interesting) is its "evidence" for C.I. Scofield (one of the greatest and most influential of all pro-Zionist Fundamentalists) being part of "the conspiracy." You want to know what the "evidence" is? Here it goes: Scofield fought for the Confederacy, but after the Civil War he got a federal job in Kansas. Boy, that sure convinces me!! [/sarcasm] At any rate, this "chr*stian reconstructionism" is, along with right wing Catholicism, one of the two quasi-official theologies of the JBS.
What you must understand is that the ultimate innermost doctrine of the anti-Semitic right wing is henotheism: that there is a separate "gxd" and a separate religious truth for each people, each of which is perfectly valid. And no religion is so susceptible of henotheism as chr*stianity. For all the aspirations to universalism, chr*stianity tends to be naturalized to each and ever culture. J*sus becomes a Pole, an Irishman, an Armenian, a Spaniard, an Aztec peasant, a Greek, an Ethiopian (the Ethiopians claim their imperial family is Solomonic), a Frenchman--and of course a "chr*stian patriotic American." Even the most well-meaning pro-Jewish of chr*stians sometimes succumb to this henotheism (appeals to "chr*stian America," after all, completely ignore any claim of universal validity and is really no different than the leftist mantra of "deze are de wayz of our pipplez"). While officially the chr*stian churches were supposed to be the "new Israel" (G-d forbid!), it is the various chr*stian nations that all aspired the the title.
Henotheists by definition hate and detest the Jewish People because they represent Universal Objective Truth, which is seen by henotheists as subversive, corrosive, and leveling. And in the western world henotheists have traditionally adopted whatever the local form of chr*stianity was--not because it was true, but because it was the local tradition. Ironically, the iconoclastic instinct one observes in liberal Jews is perfectly correct, or would be if it were used to smash paganism and local idols--unfortunately Jewish liberals tend to attack the most Jewish concepts they can find among the people they live among.
The answer is for non-Jews--all non-Jews without exception--to give up whatever false religions they have inherited and to accept the Seven Noachide Laws and the one and only valid religion for all non-Jews. This is going to happen when Mashiach comes anyway. But how sweet it would be if more people did it now--especially the most pro-Jewish of the Fundamentalist chr*stians. But I am afraid that these Fundamentalist chr*stians will not give up their belief in J*sus until the very end. Oh well.
At any rate Jews in the US live in a country where, unlike most of the past 2000 years, they are free to spread the knowledge of the Noachide laws. How that time has been wasted as Gedolim have remained silent while the "official Jewish leadership" went to secular ethnic politicians who devoted their lives to destroying faith in G-d and the Torah and promoting secularism and liberalism instead. I wish things had turned out differently, but there you are. The situation is what it is.
Sorry I can't be more helpful. Be well.
I appreciate your very long and thought post to me. I am familiar with Rushdooney and North more than I would like to be actually. I am not sure what your religious faith entails: ie: Noachide Laws or your statement about fundies not giving up their belief in Jesus until the end but no matter. You have enlightened me a great deal about various wolves in sheep’s clothing and I thank you. You too be well.