Continuity mistake: Just after Norman has been made to shoot the German, he lies on the floor with his face buried in his arms. Camera cuts and his position has changed and you can now see his face. (00:39:20)
Continuity mistake: When Norm takes the picture off the post in the tank near the start, the way he holds it changes between shots from the extreme corner to further down. (00:15:40)
Answer: There are probably a number of ways to interpret the quote, to be debated in a different forum. He's just saying thoughts about how to make the world a better place are peaceful. Rarely do people see war as a means to bring about peace. but as history shows us, war and violence often occur as a result of wanting change. Think about the 60's Civil Rights movements. Ideally, all men should be treated equally and there should be no segregation, but opposition to this resulted in violence (and to the opposition, ideally it would be better if races kept to themselves).
Bishop73