@CalamityJane,
what part of Germany did you grow up in? and what year did you leave?
of course there aren't as many, but perhaps I experienced this more than where you grew up or more than the time you were living in. I lived in Frankurt and Hannover, and Frankfurt was full of Eritrean immigrants where I grew up .... East Africans ... and obviously Turks ... but also Sri Lankans, Mauritians ... I spent my childhood in a neighborhood packed with immigrants. And I wasn't aware of the racism throughout my childhood because I guess I didn't think about these things, and nobody educated me on the issue, so I never thought that somebody might be rude to me because of that. All I would see was grouchy faces. And I didn't realize faces could look different until later on. I thought that grouchiness was normal.
Anyways, my point is that this refugee situation I was born into was a little over 20 yrs ago, and the next generation is there. We are young still ... but we are essentially there as Germans who are still not recognized. And I understand it too, because Germany is not used to this ... it's all fairly new, compared to the history of African-Americans over here or even Latinos. America has had a lot more time to get used to ethnic diversity.
In Frankfurt, in my neighborhood, I only knew 2 Germans. Later in Hannover things were very different, most of my friends were German there and I saw a lot less ethnic diversity. But I see your point, and you're right, in Hannover most Africans were very new, so the next generation is not there yet completely. Language and culture are still huge barriers there. Still, I had some friends, older than me, who would be the next generation, moving closer to Frankfurt; lots of half-Ghanaian/half-German kids, even in Hannover. Frankfurt is just different. I think Berlin would be an even stronger example, in terms of the history Africans and general ethnic diversity there.
But black people from the US shouldn't even be contrasted with them when speaking of racism because the contexts are so different. There are no slavery issues involved in Germany, which shifts the dynamics of the type of racism completely.