And that forgiveness can only be found in the Bible, not in Catholic doctrine.Well then, from Holy Writ:
"And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven." (Matthew 16:18-19)
And if Joseph Ratzinger were actually Peter in disguise, then you’d have a case.