To me, one of the the reasons I am Catholic and believe in the Catholic teachings, beliefs, and dogma is because of the chain back to Peter and consequently to Jesus Himself. No other church or denomination can claim that. The Church might not have been right on everything through the ages, but that is because it is His pilgrim church on Earth that is lead by men who, like the rest of us, are sinners. We aren’t perfect, we all make mistakes. But of the other religions, the main tenents we believe seem to be explained on sound logic. We don’t have to have the “free will” debate because we understand that our salvation is made possible by Grace, and it is through our faith and works that we may reach that salvation. But there are no guarantees. Works without faith are nothing more than gestures. Faith without works is mere lip service.
And with regard to other faith’s, I have read some of Luther’s works, I have read the beliefs of other Christian denominations, and so far, Catholicism still makes the most sense to me. I don’t know what the answer is. Do I think that all Muslims, Jews, Budhists, etc. are destined to burn in hell? I certainly hope not! But that is not for me to decide. All I can do is live my life the way that makes sense to me. And to me, the Catholic Faith makes sense. Maybe that is the purpose of purgatory, for those those Chirstians that are still stained with sin, and those that had alternative beliefs to reach salvation. Maybe it’s not. But we will all find out on our last day.