I think we have a very real problem if we are trying to establish the "real" Jesus, and are yet using as our authority bits and pieces of the Gospels etc.
Having said that, apart from the deutero-canonical books, we have nothing else.
I think that what shines through the bias that the Gospel writers had, is something of the real charismatic preacher, Jesus, on whom the cult is founded.
The real Jesus seems ,IMHO, to be trying to get his people to get back to the primitive faith of the desert, before the Law and the Torah, so anything he did in defiance of any law or practice was not to show that the Law was deficient, but to help them ,as his brothers, not to count the "tenth of the dill" etc but to go back to the spirit of their religion, as he saw it, of treating your fellow man with love and compassion.
I believe Cofty is right, Jesus was a religious Jew, I believe though that what he was trying to show was that you could live by the law and be a complete a-hole as many of the religionists of his day were, or you could live by the law and the spirit of the law as he did, and be a good person.
If the words put in to his mouth about the GN going to the nations have any basis in fact, then I think his vision was one of the Jewish religion ceasing to be important, but Love and Compassion being the guiding lights for good to all mankind.
Today's religions, even so called christian ones, fall far short of his vision, which would not have needed a formal religion, or rules and regulations, at all.