Serious question as I have followed this debate in the past & am curious as to what all sides have to say -- Is your contention that the "ceremonial" laws expired when Christ made his sacrifice backed up in Scripture or is this an interpretation/analysis after the fact?
Yes, it is backed up by Scripture.
Jesus said that He came not to change the law (paraphrase there), but to fulfill it. And He did; He was the completion and the fulfillment. The Law was given to show man that he was sinful and could not possibly atone for himself nor cleanse himself; it led straight to Christ, the true sacrificial Lamb. “Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith” (Galatians 3:24).
Gal 3:19: “What purpose then does the law serve? It was added because of transgressions, till the Seed should come to whom the promise was made.”
Gal. 3:23-25: “But before faith came, we were kept in custody under the law, being shut up to the faith which was later to be revealed. Therefore the Law has become our tutor (to lead us) to Christ, that we may be justified by faith. Now that faith has come, we are no longer under a tutor. "
Mark 7:17: "17 After he had left the crowd and entered the house, his disciples asked him about this parable. 18 “Are you so dull?” he asked. “Don’t you see that nothing that enters a person from the outside can defile them? 19 For it doesn’t go into their heart but into their stomach, and then out of the body.” (In saying this, Jesus declared all foods clean.)"
Romans 14:20" Do not destroy the work of God for the sake of food. All food is clean, but it is wrong for a person to eat anything that causes someone else to stumble."