Explanation:
Fear drove action, because instead of acting in a just way which they would regualry do in a court trial, they acted unreasonably because they were scared. Many people died simply because they were <em>scared</em> that they were witches. Their fear drove them to the action of killing many inncoent people.
Not sure if you still need this, but it is actually the last once, the Channel and Sea were barriers that made it impossible to get an invasion force to the Island without the RAF and the Royal Navy interfering