How doe Reverend Parris' and Reverend Hale's attitude toward the witchcraft scare change from the beginning of the play to the end?
Parris is reluctant for any mention of witch craft to get out, even though his daughter is suffering from a mysterious illness. He knows that the town is ripe for a witch hunt, and since he is the reverend of Salem, how would it look if Betty was afflicted by Satan. This reveals that Parris is always more concerned with himself than with anyone else. Finally, though, Hale is brought in to find the cause of the mysterious illnesses.
From the start, Hale is adamant about finding witches in Salem. In fact, his leading questions influence Tituba into claiming witch craft and beginning the hysteria.
As the trials progress, though, Hale eventually realizes his mistake. What is at work in Salem is not witch craft but vengeance. When Elizabeth Proctor stands accused, a long with other innocent citizens, it is too much for Hale and he resigns from the court.
Parris, likely realizing innocent people are being unjustly accused, keeps his mouth shut. He never makes a stand like Hale.
However, soon Salem tires of the trial. Realizing this, and that his life might be in danger, Parris changes face. He urges John Proctor, along with Hale, to confess to witch craft. The difference is that Hale is urging Proctor to do so because he feels like it is the best thing for Proctor and his wife. Parris just wants to save his reputation.