Well, we can be thankful that Calvin didn't live in the first century or all us Catholics would be dead.
Like the Protestants the Catholic Church burned to death, or tortured to death in the Inquisition?
People who live in glass houses shouldn’t throw stones.
The Roman Catholic Church history is an abomination and a stain on the history of Christianity. The corruption that existed in the papacy for so long, the sale of indulgences, the suppression of knowledge because it contradicted church teaching (Galileo for example), just to mention a few....
The only reason it has changed is because of the Reformation. As people actually began to read and understand the clear teachings of Scripture, they saw what a farce the RCC had put up and were leaving it.
It forced the RCC to make changes in itself that would NEVER have happened otherwise.
And to try to claim that an organization with that kind of history is what Christ established on earth to represent Himself is to spit in Christ’s face. Jesus would NEVER condone the behavior that ran rampant in the Roman Catholic Church throughout most of its history. He would never condone that kind of sin and deception.