Col. 2:
20 Wherefore if ye be dead with Christ "from the rudiments of the world", why, as though living in the world, are ye subject to ordinances, 21 (Touch not; taste not; handle not; 22 Which all are to perish with the using
after the commandments and doctrines "of men"?
You are making a fundamental error here, according to the doctrines and traditions of this world's religions. First, You are implying that Paul is Judging God's Commandments and Judgments as "Rudiments of this world". Paul isn't doing that. Even a child would understand, after reading the Words of the Jesus of the Bible, that the mainstream religion of that time, the religious sect of the Pharisees, were teaching for Doctrines the Commandments of men, not the commandments of God. They had, as the Jesus of the Bible teaches, "
Full well ye reject the commandment of God, that ye may keep your own tradition". These manmade commandments included washing in a certain way before eating. Not serving milk and meat at the same table.
Jesus tells us this, if men would just believe Him.
Mark. 7:
8 For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
Paul is saying the same exact thing, "
Touch not; taste not; handle not", after the commandments and doctrines "
OF MEN".
The deceiver would have us believe that God's Commandments "Are Rudiments of this world" or that we should demean Him and reduce HIS Words to that of Evil men, like the Pharisees. This world's religions always do this, but Paul never does this. He teaches "
Wherefore the law is holy, and the commandment holy, and just, and good".
Paul teaches that the men who are promoting these doctrines and commandments of men are those who "
profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate". He warns of men who "Transform themselves" into Apostles of Christ, but are really deceivers.
So I hope you might consider the error on your part here. Your thread is, Which "OT" laws should men honor God by obeying.
Paul
"Specifically" identifies for you in Colossians 2 that these "Ordinances" are not "Commandments of God", but Rudiments of this world and Commandments of MEN.
I know we both have been taught from our youth, by "Many" religious sects and businesses, all of whom "come in Christ's Name" and call Jesus Lord, Lord, that Paul is speaking of God's Commandments here. But if you read it for yourself, it is clear he is not. I'm hoping you might reconsider your adopted religious philosophy regarding Col. 2 here, and simply accept for yourself that what is written, is God's Truth.
Col. 2:
8 Beware lest any man spoil you through philosophy and vain deceit, after the tradition "of men", after the rudiments "of the world", and not after Christ.
It is simply undeniable Biblical Truth that Jesus obeyed His Father's Commandments, not the religious doctrines and traditions of the world God placed Him in. Paul is clearly teaching here in Col. 2, that we abide by the same Philosophy. "Let no man judge thee"!!!
I will address the rest of your OP in another post.
This is a great topic, and one that should be discussed, in my view.