They wouldn't really gain anything from killing, as a matter of fact it would be counter productive since people would gather against them because of it. They want total control over people and they want to break people physically and spiritually. Through torture they would eventually get the person to break and this would be good because they wouldn't be against the state anymore.
The name of the case was Plessy vs. Ferguson. Hope this helps :)
The expansion was the result of a strong desire of Manifest Destiny amongst most Americans. Manifest was a belief that the United States was destined to expand across the Atlantic Ocean to the Pacific Ocean. Westward <span>expansion had many effects on America. </span>
Answer is hostility to or prejudice against Jews.