Making friends with the enemy. Is it wrong to associate with prisoners of war that are from the other side?

An American surgeon is preparing to perform an amputation on a prisoner in Cuba. This is a very vital operation, and can be very hard on a person emotionally as well as physically. The prisoner asks the doctor if he will sit and have tea after the surgery with him. For some reason, the doctor feels obligated to do him this small favor. I read this assignment, and I was utterly disgusted by it. For …

…they should all be killed. However, as a country, they have killed thousands of Americans and they have effected every American emotionally. As a human being, this person has a right to live, and if this operation is essential than he should have the surgery done. But, he should not be treated any differently than any of the other prisoners, and should not be able to make "friendships" with Americans and take advantage of them.