Sigh... then you must think that the Pope and most Catholics aren’t Christian, either. We believe Genesis to be the story of Creation, not the literal truth.
Fundamentalism - believing the Bible to be the literal truth - is a relatively recent phenomenon.
A Christian is someone who has chosen to accept God's offer of eternal life through His Son, Jesus Christ. A Christian is someone who has put his faith and trust in Jesus Christ, who acknowledges and accepts Christ's atoning death on the cross as payment for his sins, and who trusts Christ as his Savior. I have no way of knowing if the Pope has ever made that decision, or if "most Catholics" have made that decision. I take my definition of "Christian" from what God has said a Christian is.
And how do you "believe Genesis to be the story of Creation, but not the literal truth"?
If it's not the literal truth of how the world was created, then how do you credibly believe it?