http://www.zuwanderung.de/english/3_prognosen.html
"The aim of integration should not be merely to organize the co-existence of people from different cultures; a society cannot endure internal separatism based on cultural divisions. Speaking the same language is a basic requirement for maintaining societal cohesion. At the same time, immigrants must have the chance to take part in all aspects of social, political and economic life, on equal terms and as their individual conditions and willingness allow, thereby gaining a realistic hope of belonging in German society. "