How do you know that Jesus spoke Hebrew? I'm pretty certain that he spoke Aramaic. He wasn't from Jerusalem. He was from Galilee, and the Galileans certainly didn't speak Hebrew.
I understand that Jesus had Hebrew roots and was Jewish, but that doesn't mean that non-Jews have Jewish roots. Essentially, if you followed the teachings of Plato, that doesn't mean that you would have Greek roots. It just means that you would need to understand the Greek way of thinking in order to understand the author's arguments - not that you would have to start living and walking like the author did. I think the same thing is going on here you don't need to become like the Jews of 2000 years ago (which I would dare you to do, by the way!) in order to follow the teachings of Jesus.
Where did you get that idea? There are certainly languages older than Hebrew.
A good friend of mine, Thom Stark, recently published a book about biblical inerrancy, called The Human Faces of God. He's currently working on his second book, one regarding the New Testament's position on the deity of Jesus. I read a pre-published version of his first book, and he's promised to let me have a crack at confronting his second, playing the devil's advocate, offering corrections and criticism, etc.
I'm not sure why I'm telling you this, but the deity of Jesus is soon going to be an issue that I'll read more into. As far as I've been told until now, the New Testament does indeed teach that Jesus is somehow divine in a special way, at least part of what God is. I might end up rethinking that eventually with reading this book, but I'm still uncertain what the position of Messianic Judaism is. If I asked a Baptist about the Trinity, they would all agree about it. If I asked a Oneness Pentecostal, they would all agree that there's only one God and profess something like Modalism.
Is it just the case that MJ is still young in terms of the modern movement and hasn't come to a consensus, or will there continue (do you all think) to be disagree even in the most basic of doctrinal issues among MJ adherents?