Are you talking about Matthew 5:17<quoted text>
That's because he was living under the Law of Moses, the law of the land, at the time.
Think about it. Jesus' law wouldn't come into effect until his death/burial/resurrection. So, he lived under the old law until that time.
Maybe you should actually read your bible.
But keep making things up to suit your lifestyle, it just proves that you know the bible is fiction