Actually, if you believe in the Bible, Roman Catholics OWN Christianity.  The original Christians (as in followers of Christ) were Jews (Messianic Jews) for 300-plus years, until the Roman Emperor Constantine chose to adopt their beliefs.  He put together a bunch of scriptures written by ancient scribes for those who practiced Abrahamic religions of antiquity (i.e., Jews and Arabs).  However, his religion--Roman Catholicism--had no place for Jews, so they were ostracized, tortured and killed.  Then he convened the Council of Nicea in order to elect a pope (the "vicar of Christ" on Earth, who was supposed to be infallible), and to adopt formal rules and sacraments for anyone who wanted to follow Christ from that point forward.  So, it turns out that Christianity is a religion instituted by a single man--a Roman Emperor--and not Christ himself.  This is all historical fact.  If you choose to believe otherwise, that is your prerogative.
(cont'd.)