Which character questions John Proctor regarding his religious beliefs?

The character who questions John Proctor regarding his religious beliefs is Judge Danforth. In "The Crucible," Danforth plays a pivotal role as a judge presiding over the witch trials, where he seeks to uphold the court's authority and validate its proceedings. His interrogation of Proctor is aimed at exposing any potential hypocrisy in Proctor's claims, especially as Proctor challenges the court's legitimacy and the validity of the witch trials.

Throughout the play, Danforth is very concerned with maintaining order and control, and how Proctor's beliefs may contradict the court's actions is significant in highlighting the themes of integrity and morality. This interaction is crucial as it raises questions about Proctor’s character, his past sins, and his current moral stance in the face of societal pressures and the hysteria surrounding the trials. The courtroom serves as a setting for these moral ambiguities, where Danforth emphasizes Proctor's flawed adherence to religious principles as a way to discredit him.

This dynamic illustrates the broader conflict between individual conscience and institutional authority, which is a central theme in Arthur Miller's work.