You're still grasping , and prove again that you do not understand these passages.
Let's look at another to see the extent of your error:
And it happened, while Apollos was at Corinth, that Paul, having passed through the upper regions, came to Ephesus. And finding some disciples he said to them, ... When they heard this, they were baptized in the name of the Lord Jesus. And when Paul had laid hands on them, the Holy Spirit came upon them, and they spoke with tongues and prophesied. Now the men were about twelve in all.Note the progression. Paul goes to Ephesus and finds some disciples (not in the synagogue). He preaches the fullness of the gospel to them and they are baptized (again, not in the synagogue). Then he enters into the synagogue to reason with the apostate Jews. After they refuse to listen to the gospel, he leaves and continues his ministry among the believing Jews and gentiles in "school of Tyrannus". The apostate Jews are left in their synagogue to continue to worship according to old covenant shadows.And he went into the synagogue and spoke boldly for three months, reasoning and persuading concerning the things of the kingdom of God. But when some were hardened and did not believe, but spoke evil of the Way before the multitude, he departed from them and withdrew the disciples, reasoning daily in the school of Tyrannus. And this continued for two years, so that all who dwelt in Asia heard the word of the Lord Jesus, both Jews and Greeks. (Acts 19:1,2,5-10)
Again, more proof that synagogue worship is not the worship of Paul and the other disciples.
Well somewhere along the line you switched the topic from "sabbath observance" to "synagogue worship".
Sabbath observance can take place in a synagogue, in a house, or down by a river:
Act 16:13 And on the sabbath we went out of the city by a river side, where prayer was wont to be made; and we sat down, and spake unto the women which resorted thither.
No synagogue. No jewish ceremonies, but coming together on the sabbath.
The question has always been whether or not the sabbath was observed by Christians. The answer is of course it was.
Paul believed in the sabbath of God. To state otherwise goes against his word in God inspired scripture:
Act 24:14 But this I confess unto thee, that after the way which they call heresy, so worship I the God of my fathers, believing all things which are written in the law and in the prophets:
Jesus believed in the sabbath, created through him and for him:
Mat 5:17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill.
Mat 5:18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled
Luk 6:5 And he said unto them, That the Son of man is Lord also of the sabbath.
Mat 12:8 For the Son of man is Lord even of the sabbath day.
Again, a prime opportunity for Jesus, God in the flesh, to state to his followers that the sabbath is no longer in effect. Does he? Nope, he AFFIRMS the sabbath by reminding us that he IS the LORD of the sabbath. He is reminding them, and us, that it is HIS sabbath, his creation.
And as previously pointed out, there is not one hint of controversy in scripture about a decision to NOT observe God's sabbaths.
You have tradition and culture on your side. Fortunately I have a commandment of God, the testimony of Jesus Christ, the testimony of Paul and scripture on my side.