Is this book about as valid as the baby gospels and the other books that have been determined as to be not inspired by God?
Diego is far smarter than I am on these things. However, Barnabas is purportedly the same guy as Matthias from Acts 1 who won the Apostle Lottery. I only quote this Epistle to show how early the Sabbath switch started. I usually stop reading all things theological once they cross into the "false teaching" realm to try to keep from corrupting my data base.