You responded No they didn't. As God says, the Jews broke the covenant, rendering it null and void. He then established a new one, by Jesus's blood.
We know that today. But what about the Jew of 50 AD. What evidence from SCRIPTURE ALONE gives the Apostles the authority to break part of the everlasting covenant of the Old Testament? Christians argue, correctly, that they were given this power to FULFILL the Covenant through Christ's work. But this is hidden within the OT. It is subject to interpretation that the Christians undertook as a result of their cognitive dissonance that occured after the Resurrection - trying to put two apparent truths together - that Scripture is from God AND Jesus, a condemned crinimal - was the Messiah, even the Son of God...
The only thing that gave power to the Apostles to overturn the requirement of Circumcision was their ORAL claim that Jesus rose from the dead, confirming His teachings as from God. Otherwise, with Sola Scriptura, they got nothing... They have NO authority to overturn anything from Scriptures. It is only the power given by Christ, the power to bind and loosen, that has given them the ability to loosen the requirements of circumcision upon the faithful, NOT the Bible.
Since the first Apostles did not operate under the guise of Sola Scriptura, what makes you think we should?
Regards
You have some idea that a group of men sat around and "made up" Christianity and that is just not true.
I'm not an expert on Covenent theology but if I'm not mistaken man has NO rights in disolving a convenantal promise of God. It was God who said,