cyberlizard,
the funny thing about acts 15 is that these gentiles are encouraged to start at the four, and then learn as they go as Moses is read every week (except in most christian churches).
What is funnier, is that you read the decalogue into everything.
Here are the pertinent verses:
[20] But that we write unto them, that they abstain from pollutions of idols, and from fornication, and from things strangled, and from blood.
The adjuration concerns things which would normally involve the conscience. Even atheists have trouble with these things listed. They are basics of common conscience.
And so the letter that the apostles sent as a result of the tumult said this and this only:
[29]That ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well.
Any sabbath in there? Nope. Any "go and get yourself a copy of the Torah"? Nope.
[21] For Moses of old time hath in every city them that preach him, being read in the synagogues every sabbath day.
Here Peter simply declines from confrontation: his statement is a difuser. He simply says "you can get Moses anywhere", and not "Moses should be read everywhere".
This difuser was necessary in the light of the newness of the knowledge that those born again were just beginning to enter and which would culminate in Paul's gospel of justification by faith apart from works.
The necessarily-Jewish-born first Christians did not understand much (Peter had massive trouble with the unclean foods vision, even arguing with God about it), and therefore had to be weaned from their adherence to Moses.
So Peter was simply being pragmatic, and practical, not wishing to encite the crowd to riot all over again. He was doing the best he could, esp since he wasn't really equipped to do anything else with regard to knowledge, for that was to come in Paul.
And so we note also that even Paul was pragmatic is his taking a vow with 4 others at Acts 21, and therefore submitting to the law.
But what did God do in response? He made sure the ceremony was never completed, but busted it up. For God would have none of this going backward, regardless of how weak Paul was at that stage.
And so you did not read the following from the earlier part of the chapter concerning the Gentiles comparison to the Jewish-born Christians:
[9] And put no difference between us and them, purifying their hearts by faith.
No difference generally means no difference in God's eyes, irrrespective of activity. And what brings about this no difference? "Faith".
And therefore you did not submit your ‘understanding’ of v20,21 to the following which also preceded it:
[10] Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear?
But if you want a yoke, good luck to you. I suppose a yoke would suit you anyway, for a yoke is for a work-horse, and legalists love to work.