I guess some people who demand that everyone keep the Saturday Sabbath because it was God’s mark or sign just skip right on past the sign and mark of CIRCUMCISION which God gave to Abraham as an everlasting covenant way before the Law was given to Moses (see Genesis 17). Somehow that one doesn’t count. ;o)
1 Cor 7
18Was a man already circumcised when he was called? He should not become uncircumcised. Was a man still uncircumcised when called? He should not be circumcised. 19Circumcision is nothing and uncircumcision is nothing. Keeping God’s commandments is what matters. 20Each one should remain in the situation he was in when he was called.…
I guess some people who demand that everyone keep the Saturday Sabbath because it was God’s mark or sign
Not just because it is God’s mark or sign, but because He commands us to in remembrance that he is our Creator God. It is His authority that we worship.
Well; the Roman Catholic church got rid of THAT requirement quite early:
Acts 15 Selected verses, pointing out CHURCH
1 Certain people came down from Judea to Antioch and were teaching the believers: "Unless you are circumcised, according to the custom taught by Moses, you cannot be saved."(CUSTOM???)3 The church sent them on their way, and as they traveled through Phoenicia and Samaria, they told how the Gentiles had been converted. This news made all the believers very glad.4 When they came to Jerusalem, they were welcomed by the church and the apostles and elders, to whom they reported everything God had done through them.12 The whole assembly became silent as they listened to Barnabas and Paul telling about the signs and wonders God had done among the Gentiles through them.
22 Then the apostles and elders, with the whole church, decided to choose some of their own men and send them to Antioch with Paul and Barnabas.
The apostles and elders, your brothers,
To the Gentile believers in Antioch, Syria and Cilicia:
Greetings.
24 We have heard that some went out from us without our authorization and disturbed you, troubling your minds by what they said. 25 So we all agreed to choose some men and send them to you with our dear friends Barnabas and Paul— 26 men who have risked their lives for the name of our Lord Jesus Christ. 27 Therefore we are sending Judas and Silas to confirm by word of mouth what we are writing. 28 It seemed good to the Holy Spirit and to us not to burden you with anything beyond the following requirements: 29 You are to abstain from food sacrificed to idols, from blood, from the meat of strangled animals and from sexual immorality. You will do well to avoid these things.
Farewell.
30 So the men were sent off and went down to Antioch, where they gathered the church together and delivered the letter.
41 He went through Syria and Cilicia, strengthening the churches .
Galatians 2:11-21
11 When Peter came to Antioch, I opposed him to his face, because he stood condemned. 12 For before certain men came from James, he used to eat with the Gentiles. But when they arrived, he began to draw back and separate himself from the Gentiles because he was afraid of those who belonged to the circumcision group. 13 The other Jews joined him in his hypocrisy, so that by their hypocrisy even Barnabas was led astray.
14 When I saw that they were not acting in line with the truth of the gospel, I said to Cephas in front of them all, “You are a Jew, yet you live like a Gentile and not like a Jew. How is it, then, that you force Gentiles to follow Jewish customs?
15 “We who are Jews by birth and not sinful Gentiles 16 know that a person is not justified by the works of the law, but by faith in Jesus Christ. So we, too, have put our faith in Christ Jesus that we may be justified by faith in[d] Christ and not by the works of the law, because by the works of the law no one will be justified.
17 “But if, in seeking to be justified in Christ, we Jews find ourselves also among the sinners, doesn’t that mean that Christ promotes sin? Absolutely not! 18 If I rebuild what I destroyed, then I really would be a lawbreaker.
19 “For through the law I died to the law so that I might live for God. 20 I have been crucified with Christ and I no longer live, but Christ lives in me. The life I now live in the body, I live by faith in the Son of God, who loved me and gave himself for me. 21 I do not set aside the grace of God, for if righteousness could be gained through the law, Christ died for nothing!”[e]