From a historical and biblical history How can; or perhaps a better question might be; CAN Catholicism be disproved historically.
No. History and Theology are vastly different subject areas. While one can inform the other, they can’t disprove one another. Catholicism, as I understand it (and again, I am no theologian), is based ultimately on faith. Faith in things that cannot be proven, or disproved, with history. You might be able to call into question some particular belief, but history can’t truly disprove any that I am aware of.
Take for example the resurrection. As a historian I can’t prove it happened. I can’t prove it, because it is something outside the known physical world, and history has no methodology for dealing with miraculous events. It just isn’t made to test those events. What it can do, however, is prove that people at the time BELIEVED the resurrection happened. That we can prove. Does that mean the resurrection happened? Of course not, but it proves something. The resurrection is ultimately the domain of faith. You can’t prove, or disprove it using history.
John P. Meier is a perfect example of this concept. He is, in my view, the best historian of Jesus alive today. Please check out his series “A Marginal Jew” (currently on volume 5), for the most comprehensive look into the Historical Jesus ever produced. In volume 1, he describes his goal as using the historical method to construct a purely historical picture of Jesus that ignores later theological views. In his most recent volume, he argues that only five (maybe four, I can’t quite remember) of Jesus’ parables can be reliably traced back to him. For the others, there isn’t evidence that they go back to Jesus.
This is enormously controversial. One reviewer condemned the book as heretical. That reviewer missed the point. Meier was working as a historian, using the historical method. He results do not prove ONLY those parables came from Jesus and the others were invented by charlatans. His results just show that those parables did come from Jesus, and there isn’t evidence the other came from him. That gap is the domain of faith.
John Meier is a Catholic priest who teaches at Notre Dame University, all of his books have received the imprimatur from his local ordinary, and his work has been praised by and quoted by Pope Benedict XVI. He has written many essays on how his work as a historian cannot contradict his faith, precisely because they are fundamentally different things.
Anyone who tries to use history as a weapon against religion is going to end up with bad history, weak faith, or both.