First off, the Church of which I am a member does not hold Sunday to be any more appropriate for worship than any other day. At our locales in the Middle East, it's not uncommon for the weekend worship services to take place on Friday.

Also, when Jesus referred to the Law, was He referring only the Ten Commandments, or did He include the laws of the Levites in that statement? I'm sure you know where such an argument would lead.

Also, concerning the law, Jesus complimented a Roman centurion for his great faith. Being a centurion was often a bloody job, especially given that such was already a position of high rank in the Roman legion. What happened to "Thou shall not kill?" There's nothing in that Commandment about "unless your government orders you to do so."

What I'm getting at is your interpretation of 'fulfill' comes with its own set of problems.