My version of "Christianity" is actually fairly close to the Islamic version. No Trinity, most of the texts are "corrupted" and filled with interpolations, edits, and tamperings, and we have no way of knowing what exactly the originals said short of Divine revelation or further manuscript discoveries (which there may possibly very well be hidden documents in certain libraries, such as the Vaticanus which Napoleon had to force the Vatican to hand over for objective scholarly review) . There are texts like the Egerton Gospels that show there may have been things the later writers snipped out. We don't really know what was written prior to the 4th century except for fragments, and it seems the Nazarenes and Ebionites went by a version of Matthew that was called "Gospel to the Hebrews" and rejected Paul as an apostle. That's another issue, Paul's epistles paint a radically version of "Xtianity" than what you'd get from reading Matthew and James, and of Paul's epistles, many of them are considered completely spurious. I also regard certain "non-canonical" texts that some may call (erroneously) "Gnostic" like Gospel of Philip as very possibly inspired (though some are truly "Gnostic" in the post-Sethian sense). I disagree with the later Rabbinical/Talmudist teachings, and find the words of Yashua to be what I believe as well, and I believe he fits the description of what the Guilt Offering of Isaiah 53:10 is. Those who say he doesn't fit the Messianic requirements, I say that he the process wasn't meant to be done overnight, but over the course of a long time, even over 2000 years, similar to how the Jews wandered in the desert for 40, I see the prophecies unfolding over a course of the ages.
But I do believe one should not throw out the entire concept that Yashua was the Moshiach because of these issues. One is left to put it together like a puzzle, of what fits the Jewish scriptures regarding what the Moshiach and New Covenant is supposed to be (such as from Isaiah and Jeremiah), and to look out for what is later gentile editing meant to structure their own heathen doctrines that deviated from the original teachings. Ultimately I am "Christian" in the sense that I believe Yashua was the Jewish Moshiach, but I am not "Christian" in the sense of the beliefs of those who were part of the Orthodox or "Gnostic" movements, (though some who were called "Gnostics" weren't really in the same boat). I believe the Nazarenes and Ebionites correctly carried on the teachings of Yashua, who taught a reactionary approach to the Ancient Israelite religion, denouncing the Pharisees and Sadducees (and perhaps Hellenists) and restoring a "pure" form of Israelite religion.