Are you a Catholic, or do you just wish to adopt their original doctrines? Colossians 2:16-17 is referring to pagan's accusations against Christians keeping the feasts that God originally ordained for good reason. God doesn't change in midstream. Those original things that God gave us are for our own edification, so it's not by our works, but His.
No, I am not Roman Catholic. I am a former Sabbath/festival keeper who was deceived by the false doctrines of individuals such as yourself.
In regards to the use of the word Judaizer below, I am commenting about those who say the Sabbath and/or Holy Days are requirements or conditions or necessary proofs of salvation. I am not talking about individuals who observe such days out of preference or individual conviction without trying to force other Christians to observe them.
The Old Covenant was clearly temporary in nature and Galatians 3 is clear in this regard.
So does Colossians 2:16-17, as you can see the Sabbath and Holy Days are mentioned in the same context as food and drink offerings. You can also compare the language of Hebrews 10:1-2, which speaks of animal sacrifices, with the language Colossians 2:16-17 employs with regards to the Sabbath and Holy Days, to see that they are placed in the same level of applicability to New Covenant Christians. Food and drink offerings are also mentioned in Hebrews 9:10-12, as being only until the "time of reformation" which is until Christ came and died on the cross as indicated by the following verses.
While your arguments may convice a gullible inexperienced person like I was 30 years ago, they are foolishness to someone who has more than a surface level understanding of Scripture and history.
Your contention that Colossians 2:16-17 is referring to Sabbathkeepers being judged by non-Sabbathkeepers is not coherent and I have proven that conclusively on other threads. Judaizers have a long history of judging others, and the Scriptural evidence of this is mentioned in one of the threads I list below.
It is Judaizers who are continually making accusations that others are false Christians and following a false system. They are the ones who continually judge and call others "so-called Christians", "false Christians", following a "false Christianity", etcetera, etcetera.
One might note that many Judaizers hold very bad theology in other areas, including denying the Trinity, the full deity of Jesus Christ, etcetera. The group I came from claimed they were God beings in embryonic form, and would be born into the Kingdom of God as fully God.
If anyone really wants to see the errors of Judaizers and their bad logic, see these threads:
http://christianchat.com/bible-disc...-17-sabbath-festival-new-moon-observance.html
http://christianchat.com/bible-discussion-forum/115326-hebrews-4-9-real-sabbath-jesus.html
http://christianchat.com/bible-discussion-forum/115415-matthew-5-17-19-sabbathkeeping-claims.html
http://christianchat.com/bible-disc...hkeepers-concerning-colossians-2-16-17-a.html
http://christianchat.com/bible-disc...ebrews-10-1-2-judging-non-sabbathkeepers.html
http://christianchat.com/bible-discussion-forum/117465-structure-old-covenant.html
http://christianchat.com/bible-disc...questions-sabbath-festival-torah-keepers.html
http://christianchat.com/bible-discussion-forum/117464-sabbath-circumcision-comparison.html
http://christianchat.com/bible-disc...-old-covenant-observance-causes-division.html