Explain the argument the General Zaroff made about the war?

Zaroff is arguing that Rainsford's experiences in the war, the battles and death, should have hardened him..... detached him from the value of human life..... deadened his senses, as well as his sense of right and wrong..... his honor.

The general laughed with entire good nature. He regarded Rainsford quizzically. "I refuse to believe that so modern and civilized a young man as you seem to be harbors romantic ideas about the value of human life. Surely your experiences in the war--"