Jesus created HIS Church, not a denomination.
NO ONE denomination has the right to claim to be the only believers.
Jesus created his Church. Man created Denominations. Before the various splits due to Luther and Henry VIII, there was a single church, the Catholic Church.
Also, no Catholic with a real understanding of his faith would ever claim that Catholics are the only believers. We do believe that we have the fullness of the faith because we have the entire body of revelation through Scripture and Sacred Tradition. That doesn't mean that non-Catholics do not have at least that part of revelation provided by Scripture.
Ah, Race ... you and I both know the "church" is the body of believers, not a building no matter how grand or elaborate it is. It looks like a dirty shack to Him. As it says in the Bible, our best works are filthy rags to Him.
I doubt that you'll get through ...but keep trying.