Who said anything about an intermediary. You argument is that God did not become man, Christians know that he did, so there is no intermediary.
And you are correct, Jesus did not obey Jewish law, that was the point...
As far as changing and requirements, I beg to differ...
As I have stated before,the Torah is binding and eternal and is not to be changed. Also, Jesus is used as a intermediary to get to G-d,correct?
Perhaps one of the biggest issues is that he never claimed to be G-d. This idea was thought up at the Councils of Nicea and Constantinople. Weren't the Gospels written at least 40 years after Jesus' death? The contradictions of Matthew,Mark,Luke and John are astounding. Who do you believe?