The Pope is not making this claim on his own and he is not the source of the claim. This claim was demonstrated by Jesus Christ, by his words and his resurrection.
"by his words and his resurrection."
You are taking the words of one man, who claims to be the son of this omnipotent power that created all, as fact. Also, thier is no proof that Jesus was indeed resurrected. Those are your beliefs. Like I said, I have respect for the Christian faith, but I do not believe what you do.