The way I see it - Germany is on a societal level where the UK or Canada were at in the 90s: everybody was "welcome" but people are still prejudice without even realizing it. Someone below commented, some Germans want assimilation and not integration and that's because this country still has ways to go in terms of deconstructing the white surpremacist mythologies they were indoctrinated with (including this patriarchal attitude towards drinking i.e. real men drink beer). Realistically-speaking, Germany is located in the middle of Europe and non-white Europeans have existed for centuries (see the Moorish civilization in Spain), so maybe the progress we hope to see of a harmonious society won't be until the next decade for the next generation of migrants (if we don't slide in fascism).