My $0.02. Jesus was preaching to Jews when he talked about the Law remaining. But the NT releases gentile Christians from the Law. This happens in Acts of the Apostles at the Council of Jerusalem. St. James basically says that gentile converts to Christ need only keep the Law of Noah. So, I see no contradiction there.
>> “Jesus was preaching to Jews when he talked about the Law remaining” <<
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True, and Paul explains the mechanics of that in detail in his epistle to the Romans. Judah had to be blinded temporarily in order to preserve the knowledge of Christ’s feasts for the end time generations.
He also speaks of it cryptically with the Thessalonians.
Now that’s a stretch. I am always amazed with the machination we humans go through to avoid obeying the simple instructions given to us by the Creator. “You may not eat from the fruit of the tree of the knowledge of good and evil” seems too easy... What’s our excuse?