Which practice of the Roman Catholic Church did Luther not object to?

Luther's primary objections to the practices of the Roman Catholic Church centered around issues of salvation and the authority of the Church. The sacrament of Baptism was a significant aspect of Christian practice that Luther did not dispute; he believed in its importance and upheld it as a valid means of grace. In fact, he viewed Baptism as essential to the faith, aligning it with scriptural teachings.

On the other hand, Luther strongly criticized the selling of indulgences, the priestly intercession for absolution, and the Church's overarching control over personal conscience. He contended that salvation is achieved through faith alone and that the authority of scripture should surpass that of Church traditions and the clergy. This foundational theological shift contributed to the emergence of Protestantism and marked a pivotal moment in religious history.