Who is Heinz Knechtmann from Welcome to the Monkey House and what is their importance?

Heinz is twenty-two years old and works in a dry-cleaning plant. He is described as looking older than his age. He has been through a lot in his life. Everyone in his family has been killed in the Holocaust. He and his wife have already lost one child during childbirth. Heinz is ultimately a good, kind person, which shows on his face.