Debate over violence in games

In El Dador (The Giver) Jonas becomes very upset in chapter 17 when he realizes that his friends are playing a 'war' game.  He had just experienced a memory of true war, something his friends do not understand, so watching them play a game about war as if it was fun was very upseting to him.  Our class is going to have a debate about the idea of violence in games.  Do violent games cause violence or are they just games?  
Click on the link below to see the rubric (in Spanish) and the links to the useful websites to help us build our arguments. 
F:\7th-8th bilingual LA rotation 2\circulo de literatura el dador\debate de juegos violentos.htm