The debate wasn't about whether they were allowed to eat pork or whether they had to keep the Sabbath. Those commandments came directly from God and were not being questioned.
5 One person esteems one day above another; another esteems every day alike. Let each be fully convinced in his own mind. 6 He who observes the day, observes it to the Lord; and he who does not observe the day, to the Lord he does not observe it.
He who eats, eats to the Lord, for he gives God thanks; and he who does not eat, to the Lord he does not eat, and gives God thanks.
Romans 14:5-6
Sorry brother, the Law of Moses has vanished away.
18 So He said to them, "Are you thus without understanding also? Do you not perceive that
whatever enters a man from outside cannot defile him, 19 because it does not enter his heart but his stomach, and is eliminated,
thus purifying all foods?"
Paul teaches that Sabbaths were the shadow, and are fulfilled in Christ.
16 So let no one judge you in food or in drink, or regarding a festival or a new moon or
sabbaths, 17
which are a shadow of things to come, but the substance is of Christ... 21 "Do not touch, do not taste, do not handle," 22 which all concern things which
perish with the using--according to the commandments and doctrines of men? 23 These things indeed have an appearance of wisdom in self-imposed religion, false humility, and neglect of the body, but are of no value against the indulgence of the flesh.
Colossians 2:16-17,21-23
that you abstain from what has been sacrificed to idols, and from blood,
Brother these heathen would drink blood.
The New Testament teaches against all type of sin and immorality. Wearing Jewish clothing, or observing special days, or not eating certain foods will have
no affect on a person's desire to be engaged in sexual immorality.
The conclusion to Acts 15 debate -
Since we have heard that some who went out from us have troubled you with words, unsettling your souls, saying, "You must be circumcised and keep the law"--
to whom we gave no such commandment--
If they intended Gentiles to keep the law of Moses and be circumcised ever again, they would have said so.
If they meant for the Gentiles to keep the law and become circumcised at any time for any reason, then that would have been the time to say so.
No instructions of the sort were given.
JLB