One theory on why the Salem Witch trials happened is because of tensions and resentment (Staff). Hatred and stress were running high due to the afflictions the people had faced. Jealousy rose up and caused those who were innocent to be accused and may have been lead to death and extreme torture. Whether it was because of revenge, jealousy, resentment, need of attention, or fear of someone, many were accused.
Witch trials were already happening in England back in the fourteenth century (Staff). Since those strong in puritanism had moved to America in New England and this was a new world they were very high strung and believed there to be many evils out to get them. Rivalries were made and many felt wronged.