My Revelation

[Lek]

Actually, Jesus did say he came to fulfill the law and the prophets.

It's not one of the "authentic" sayings the Jesus Seminar accepts as a real saying. 
None of the other gospels have it. You have no evidence he actually said anything. 
It's obviously a "post-dictum" put in later after the theology had decades if not centuries to develop. 
You should learn how to interpret this literature and be sensitive to highly developed theology. The Way sect had no such concept.
First you have to learn the ACTUAL developmental steps and history of when and how, over the decades and centuries, the various concepts developed.
You can read the proceedings of all the Councils on Fordham University's website. You can actually watch as they cooked up Christianity from scratch.

"Fulfilling" the prophets is not a Hebrew/Jewish concept. In fact "prophesy as prediction" was specifically forbidden in Hebrew culture.
The ancient role of a prophet in Hebrew culture was to interpret the words or will of their god to the people OF THEIR OWN DAY. NOT to predict the future. (That's Hollywood's idea of the role of a prophet). So you often hear fundies talking about "prophesy", and how various prophesies were a 'foretelling", or prediction of the future, and indeed they count them up as "proof" that Jebus or whatever HAS to be true, as the "prophecy" came true.

In fact Deuteronomy forbade fortune telling omen reading and divination, so we know it was an abomination to even think in these terms for many/most centuries in Hebrew culture. However, with the rise of Apocalypticism, around the turn of the millennium, this changed somewhat, and is evidenced in many Christian writings, including the gospels, as they adopted the notions absent in ancient Israel, but coming into popular view with the Essenes. In terms of Hebrew culture, and the "telling of or prediction of" the future, was unknown, and forbidden, and not at ALL a view of the major prophets themselves. However in the the new view, certain "hidden meanings" or "pesherim" began to be looked for, in the practice of Midrash. The name for this is called "pesher", (or seeking a "hidden meaning"), which was not even known to the original speaker/writer, but only "revealed" later to certain believers. Originally, the (plural) "pesherim" were only fully revealed to the Son of Righteousness, (the leader of the Essenes), and the idea was first found and fully understood after scholars read the Dead Sea scrolls, and was a sub category of "Midrash", (or study of the texts).
http://en.wikipedia.org/wiki/Pesher
http://en.wikipedia.org/wiki/Midrash
Thus we see that "prophesy" as fortune telling as began to be practiced in Judaism around the First Century, (and picked up by Christians and the gospel writers), really was a very late invention and never a classical part of Hebrew scripture, or understanding, either interpretation, or intention, and certainly was not the function of the ancient office of "prophet", in Hebrew culture, who was to be a "mouthpiece" to the people of their own day, and not Madame Zelda with her crystal ball.

"Let no one be found among you who sacrifices their son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft" 
Deuteronomy 18:10

The opinion of the Jesus Seminar is one of many opinions put forth by biblical scholars. You can choose to accept their opinion if you like, but they are definitely not authoritative. Actually, nobody alive was there with Jesus, so nobody can "prove" what he said.