If you are going to treat these writings as a single cohesive narrative, you still have to keep in mind the context.
One of the most interesting aspects of the writings Jesus, is that he only ever taught Jews. Jesus in fact never really laid out a formal theology of what to do after his death, he simply stresses that the second coming would be very soon.
The only person to discuss the applicability of the Torah to non jewish followers of Jesus is Paul. Paul is extremely clear that the Jewish law does not apply to non Jews.
It's also interesting that Paul never met Jesus, that Paul persecuted christians until a burning bush talked to Paul in a moment of divine inspiration, and afterwards Paul largely relied on his excellent knowledge of jewish scripture to explain why the jewish scripture no longer applied anymore.