Have you read Pope Leo X’s rebuttal Exsurge Domine? However valid Luther’s criticisms were, the man was clearly rebellious and uncooperative from the get-go, undermining Catholic authority, including the Pope himself. Reasonable reform was not part of his agenda, and the 95 Theses is commonly regarded today as the catalyst for the Reformation. Here are some of the Pope’s words:
As far as Martin himself is concerned, O good God, what have we overlooked or not done? What fatherly charity have we omitted that we might call him back from such errors? For after we had cited him, wishing to deal more kindly with him, we urged him through various conferences with our legate and through our personal letters to abandon these errors. We have even offered him safe conduct and the money necessary for the journey urging him to come without fear or any misgivings, which perfect charity should cast out, and to talk not secretly but openly and face to face after the example of our Savior and the Apostle Paul. …] *But he always refused to listen and, despising the previous citation and each and every one of the above overtures, disdained to come. To the present day he has been contumacious. With a hardened spirit he has continued under censure over a year. What is worse, adding evil to evil, and on learning of the citation, he broke forth in a rash appeal to a future council. This to be sure was contrary to the constitution of Pius II and Julius II our predecessors that all appealing in this way are to be punished with the penalties of heretics. In vain does he implore the help of a council, since he openly admits that he does not believe in a council.
Therefore we can, without any further citation or delay, proceed against him to his condemnation and damnation as one whose faith is notoriously suspect and in fact a true heretic with the full severity of each and all of the above penalties and censures. Yet, with the advice of our brothers, imitating the mercy of almighty God who does not wish the death of a sinner but rather that he be converted and live, and forgetting all the injuries inflicted on us and the Apostolic See, we have decided to use all the compassion we are capable of. It is our hope, so far as in us lies, that he will experience a change of heart by taking the road of mildness we have proposed, return, and turn away from his errors. We will receive him kindly as the prodigal son returning to the embrace of the Church. *