Brilliant! so you took the words of one disturbed human being and painted 100s of million CHRISTIANS, with that same brush.
as far as Catholics and the Pope being Christian,
Christ made Peter the leader of the apostles and of the church (Matthew 16:18-19). In giving Peter the keys of the kingdom, Christ not only made him leader, but also made him infallible when he acted or spoke as Christs representative on earth (speaking from the seat of authority, or ex cathedra). This ability to act on behalf of the church in an infallible way when speaking ex cathedra was passed on to Peters successors, thus giving the church an infallible guide on earth. The purpose of the papacy is to lead the church unerringly.
We have to agree to disagree, that is not the case as I read the bible, but many of is know, different people will understand it differently. What defines a Christian is whether or not they believe in Jesus Christ and his sacrifice and being saved by grace.