“And you would be right also. The Catholic Church, who canonized the Bible, is the pillar and foundation for the Body of Christ on Earth made up of His believers.”
So why are some believers excluded?
They are only excluded by their own choice. There is only one church, it is One, Holy, Catholic and Apostolic. Non-Catholic Christians aren’t considered to have an inferior faith but they join themselves to organizations which cannot be Church because there is only one, established by Christ and protected by the Holy Spirit and it will prevail until the end of time.