Reverend Hale contributes to the emotional fever of the end of the act by completely believing the girl's confessions. Reverend Hale was called in order to investigate the claims of witchcraft. However, he was so dominated by his belief in witchcraft that he failed to realize that the claims were false. Instead, he adds to the hysteria by praising God and deciding to believe the girls, which precipitates the tragedies that came afterwards.
Reverend Hale, of The Crucible, lent credence to the girls' claims of witchcraft.
He should have been the best person to know the signs of witch craft or the devil but instead he chose to believe the claims of the girls without doing further investigation. His position as a Reverend is very revered that people believed the girls when they saw that Rev. Hale believed them. This resulted to the people succumbing to their hysterics.
