Paul, the Roman who got his start by executing these followers of the new "Jesus cult"? Because they were too subversive to the status quo? Who later co-opted that cult, became its chief spokesperson, and began embedding a Roman-style moral system in their primary doctrines? That Paul?

The Old Testament which Jesus supposedly replaced with a New Covenant? That Old Testament? The one enscribed by followers of Yaldabaoth?

Also, the quote you mentioned:

Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them.

What he also says about the law and the prophets:

Hearing that Jesus had silenced the Sadducees, the Pharisees got together. One of them, an expert in the law, tested him with this question: “Teacher, which is the greatest commandment in the Law?”

Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ This is the first and greatest commandment. And the second is like it: ‘Love your neighbor as yourself.’ All the Law and the Prophets hang on these two commandments.”

–Matthew 22: 34-40

So it seems the "fulfillment of the law" really means "to make everything contingent on love." (Agape, not Eros).

And saying he didn't come to abolish the law sounds like another way to keep the feds off his back.