Absurd conclusion. "Therefore let no one judge you by what you eat or drink, or with regard to a feast, a New Moon, or a Sabbath. These are a shadow of the things to come, but the body that casts it belongs to Christ." Colossians 2:16 & 17.
Those verses leave room for two scenarios:
1.) The Colossians were not celebrating God's feasts, they were being judged by Jews because they were not, and Paul was encouraging them not to let anyone judge them for not celebrating them.
2.) The Colossians were celebrating God's feastps, they were being judged by pagans because they were, and Paul was encouraging them not to let anyone judge them for celebrating them.
In Colossians 2:16-23, Paul described the people who were judging the Colossians as promoting human precepts and traditions, self-made religion, asceticism, and severity to the body, which means that they were being judged by pagans and that the second scenario was the case. Those promoting asceticism and severity to the body would be judging people for celebrating feasts, not for refraining from doing that. God's feasts are foreshadows of what is to come and we should live in a way that testifies about the truth of what is to come by following Christ's example of celebrating them rather than a way that bears false witness against what is to come, so Paul was emphasizing the importance of not allowing anyone to prevent us from obeying what God has commanded, which makes it especially ironic that you are trying to use these verses to justify your refusal to obey what God has commanded.
The Torah demands that covenant people be circumcised. Paul said circumcision is not only unnecessary but meaningless. (Galatians 6:15). You can't have it both ways. Either the Torah has been superseded or Paul is an evil heretic.
It is important to recognize that a servant of God can speak against obeying what God has commanded for an incorrect reason without speaking against obeying what God has commanded. If Paul have been speaking against circumcision for any reason, then Galatians 5:2 would mean that Paul caused Christ to be of no value to Timothy when he had him circumcised and Christ if of no value to roughly 70% of the men in the US. In Acts 15:1, men from Judea were wanting to require Gentiles to become circumcised in order to become saved, however, that was never the reason for why God commanded circumcision, so the Jerusalem Council upheld the Torah by correctly ruling against requiring Gentiles to become circumcised for an incorrect reason. In Exodus 12:48, Gentiles who want to eat of the Passover lamb are required to become circumcised, so the Jerusalem Council should not be interpreted a ruling against Gentiles correctly obeying what God has commanded as if they had the authority to countermand God. Paul was a servant of God, so he therefore did not speak against obeying what God has commanded, but if you think that he did, then you should be the one arguing that he was an evil heretic.
"..........by abolishing in His flesh the law of commandments and decrees. He did this to create in Himself one new man out of the two, thus making peace...." Ephesians 2:15
The Greek word "dogma" is not used by the Bible to refer to the Torah. In Ephesians 2:12-19, Gentiles were at one time separated from Christ, alienated from Israel and strangers to the covenants of promise, having no hope and without God in this world, which is in accordance with Gentiles at the time not being doers of the Torah, but through faith in Christ all of that is no longer true in that Gentiles are no longer strangers or aliens but are fellow citizens of Israel along with the saints in the household of God, which is in accordance with Gentiles becoming doers of the Torah.
I realise that the truth is of no use to you because you are blind. The only reason I respond is to help others who might be persuaded by your false doctrine. All that you have said implies that Jesus died and rose again for nothing.
The torah is truth (Psalm 119:142), so you are imposed to truth. It bizarre that you are the one who is arguing against following Christ's example of obedience to what God has commanded and you consider me to be blind. In Titus 2:14, Jesus gave himself to redeem us from all lawlessness and to purify for himself a people of his own possession who are zealous for doing good works, so the way to believe in what Jesus accomplished through the cross is by becoming zealous for doing good works in obedience to the Torah (Acts 21:20) while the way to believe that he died and rose again for nothing would be by returning to the lawlessness that he gave himself to redeem us from.
Galatians 5:1-4
"It is for freedom that Christ has set us free. Stand firm, then, and do not be encumbered once more by a yoke of slavery."
If God saved the Israelites our of slavery in Egypt in order to put them under slavery to the Torah, then it would be for slavery that God sets us free, however, Galatians 5:1 says that it is for freedom that God sets us free, so you are not correctly identifying what he was speaking against. In John 8:31-36, it is the transgression of the Torah that puts us into slavery while the truth sets us free.
On the basis of your own words, how can you claim to be saved?
In Psalm 119:29-30, he wanted to put false ways far from him, for God to be gracious to hi by teaching him to obey the Torah, and he chose the way of faith by setting it before him, so this has always been the one and only way of salvation by grace through faith in Christ alone.
"Take notice: I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all. Again I testify to every man who gets himself circumcised that he is obligated to obey the whole law. You who are trying to be justified by the law have been severed from Christ; you have fallen away from grace."
God wanted His children to repent and to return to obedience to the Torah all throughout the Bible and even Christ began his ministry with that Gospel message (Matthew 4:15-23), so it would be absurd to interpret Galatians 5:4 as Paul warning us against obeying God and warning that we will be cut off from Christ if we believe the Gospel of Christ. It would also be absurd to interpret Psalm 119:29 as him wanting God to be gracious to him by teaching him how to fall from grace, so again you are not correctly identifying what Paul was speaking against.