1. He knew the psychological causes and effects of fighting in a war aka trauma , being ripped from your innocence, isolated and the thought of killing as a everyday sport. 2. It go against his principles, he doesn’t believe in the killing but he is also scared about what his family might say. 3. He says the war was only fought by men who were “reluctant and conflicted. And he will feel guilty for ignoring his own objection to the United States involvement in Vietnam.