Obviously the Church teaches that Christ died for all, but not all accept that gift, Catholics and otherwise. But with this humor as with all humor, perhaps Colbert points out how misinterpreting the Pope's remarks could ramp up the antipathy so many already have for the true Faith. But he is funny. But the Church teaches that Jesus saves people, works outside of the Church as well as within but ultimately anyone who is saved, Catholic or otherwise, is saved through Jesus Christ as He makes them a member of the Church, in small ways here, with bits and pieces of the Church's truth even in non Christian religions or in the lives of those who have no faith at all, professed atheists even. All of us are created in the image and likeness of God and imprinted divine Goodness. That's as essential Church truth. So because of that all people are inquirers in the pre-catechumenate. For some who are not Christian, even atheists, they'll have to go through the Rite of Acceptance, the Rite of Election and Full Initiation into the Church at their personal judgement when the good they have done enables them to recognize Christ and His Church completely. They'll experience the Church suffering and the Church Triumphant. For outside the Church, there is no salvation, for outside the Church is outside Jesus!