Without trying to continue the debate, I will simply add this for benifit of those who do like to learn the background information.
This is a good example of why it is important. You are suggesting that they taught that abstaining from meats was the way to be saved. However, that is not what the Gnostics taught. By reading the documented scholarly studies on what we can know about these first century false teachers Paul is addressing is that they taught that those who did these things were more spiritual, not that it was the only way to be saved. They were trying to convince them that this was a path to enlightenment and the way to be initiated into the fuller secret knowledge of the elite spiritual and to communicate with angels. They did not condemn the others of not being saved or part of the church but of being less than them in their illumination. And this was what Paul called doctrines of demons.
Google "what did the false teachers teach about abstaining from meats in Ephesus" or in the book of Timothy, or something similar and you should soon find some of the scholarly references to what we can know and not know about it. What we can know is helpful in understanding who and what Paul was dealing with when he wrote this to Timothy concerning those in the church at Ephesus.
1The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons.
2Such teachings come through hypocritical liars, whose consciences have been seared as with a hot iron.
3They forbid people to marry and order them to abstain from certain foods, which God created to be received with thanksgiving by those who believe and who know the truth.
4For everything God created is good, and nothing is to be rejected if it is received with thanksgiving,
5because it is consecrated by the word of God and prayer.
