One has to experience certain interactions and opinions on the streets. I know we need migration and there has been plenty of people perfectly assimilating but we are struggling with the integration part currently.
I sincerly think most of the issues I observe are due to German/European Rap Music which is nowadays mainstream and way out of line. Teenagers across the board adapt arabic phrases from said music and butchering the language. Let alone adapt the text literally.
Teachers and people working at the kindergarten I know of describe the migration rate at almost 90%. And the majority of parents do not show willingness to educate+integrate, they say. But I don’t know of any numbers!!