Some guy who lived several decades after the time of Christ may or may not have given his opinion on this subject. We have no idea whether Barnabas actually existed, whether he actually wrote his epistle, or whether it was written by someone else and attributed to him.
How is this proof of anything other than a 2,000 year old manuscript says something you agree with?
That's actually the point of the video. The Epistle of Barnabas is not presented as proof because it is inspired Scripture, nor because we know with certainty that the historical Barnabas wrote it.
The value of the document is historical. It shows what at least one prominent Christian teacher, writing roughly within a generation or two of the Apostles, believed about the covenant, the Law, the Temple, circumcision, and the Church.
You are free to disagree with Barnabas. But if someone claims that ideas like the Church as the heir of the covenant, the fulfillment of the Mosaic Law in Christ, or the rejection of a continuing salvific Mosaic order are late medieval inventions, Barnabas is evidence that Christians were arguing those points extremely early.
The question is not "Is Barnabas infallible?" The question is "What does this document tell us about early Christian belief?" On that point, it is a very important witness.
That belief aka supersessionism was the default interpretation of the Bible until the 1930s-40s when jews started lobbying churches to claims jews were still chosen. Almost all churches on Earth then fell in line.
most Christians are really just jew worshipers and members of the blood cult. It means submitting to an international jew banking system which makes every pseudo-Christian complicit in the evil of the regime which is under the guise of zionism. Zionism is the jewish intention to bring about the anti-Christ and for some reason these pseudo-Christians are compelled to assist them despite proclaiming Christ. They also have trauma spaces in their brain because they had their penises butchered because jews like to take the skin off the tip of the penis and say it is for health or something. It's all sick black magick stuff but most Christians are not really untethered from the devil system.
How is this proof of anything other than a 2,000 year old manuscript says something you agree with?
The value of the document is historical. It shows what at least one prominent Christian teacher, writing roughly within a generation or two of the Apostles, believed about the covenant, the Law, the Temple, circumcision, and the Church.
You are free to disagree with Barnabas. But if someone claims that ideas like the Church as the heir of the covenant, the fulfillment of the Mosaic Law in Christ, or the rejection of a continuing salvific Mosaic order are late medieval inventions, Barnabas is evidence that Christians were arguing those points extremely early.
The question is not "Is Barnabas infallible?" The question is "What does this document tell us about early Christian belief?" On that point, it is a very important witness.