The people of Salem or those who stayed in Salem, Massachusetts around 1692 were known as part of those who professed to be Christians who believed that Satan was directly responsible for every tragedy in their in life. And thus, felt that the remedy to their misfotune was killing those who they viewed as agents of Satan.
This religious view resulted in the eventual feelings of people, and their regret over the trials was again marked by blaming Satan for their actions.
