it is because German governments want to have "youth protection" or something like that...
http://community.enemyterritory.com/forums/showthread.php?t=25358

Here in America, violence is a moral virtue which we want our children to learn. Like neo-sparta

In contrast, violence in Germany is solely reserved for the peace protests...which makes perfect sense http://www.youtube.com/watch?v=ImKMySddxgg