No, the context of Colossians 2:16-17 has nothing whatsoever to do with the old covenant “offerings” for sin. It quite plainly states that new covenant believers in Christ should not let anyone judge them with regard to keeping the old covenant dietary regulations and appointed yearly, monthly, and weekly religious observances. Don’t let anyone deceive you and bring you under that type of bondage, brothers!
“So let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths [there’s absolutely nothing in the text that refers to old covenant “offerings” for sin here], which are a shadow of things to come, but the substance is of Christ.” (Colossians 2:16-17)
Paul makes this same basic point in two other passages of Scripture as well.
“You observe days and months and seasons and years [he’s criticizing them for observing these weekly, monthly, and yearly religious ordinances as if they are still required, for those who are dull of perception]. I am afraid for you, lest I have labored for you in vain.” (Galatians 4:10-11)
“Receive one who is weak in the faith, but not to disputes over doubtful things. For one believes he may eat all things, but he who is weak eats only vegetables. Let not him who eats despise him who does not eat, and let not him who does not eat judge him who eats; for God has received him. Who are you to judge another’s servant? To his own master he stands or falls. Indeed, he will be made to stand, for God is able to make him stand. One person esteems one day above another; another esteems every day alike. Let each be fully convinced in his own mind.” (Romans 14:1-5)
The Apostle Paul couldn’t have made himself any clearer. Under the new covenant a believer is free to regard or disregard the old covenant dietary laws and appointed religious feasts and sabbath observances. They are, quite simply, no longer binding upon any believer in Christ to keep. Only a person who is ignorant and weak in the faith believes that they are still binding and will try to impose them upon others.
I understand perfectly where you are coming from @rgmann so let's consider this from the person who wrote what we are reading.
Was Paul the apostle to the gentiles?
Was apostle Paul a hypocrite ?
Regarding salvation and holiness is there a difference between the jew and the gentile?