[1] http://en.wikipedia.org/wiki/Riot_of_Rostock-Lichtenhagen
[2] http://en.wikipedia.org/wiki/Riot_of_Hoyerswerda
[3] http://en.wikipedia.org/wiki/Solingen_arson_attack_of_1993
[1] http://en.wikipedia.org/wiki/Riot_of_Rostock-Lichtenhagen
[2] http://en.wikipedia.org/wiki/Riot_of_Hoyerswerda
[3] http://en.wikipedia.org/wiki/Solingen_arson_attack_of_1993
Sorry, both sources are in German. Maybe Google translate will help a little?
[1] http://www.mut-gegen-rechte-gewalt.de/news/chronik-der-gewal...
[2] http://de.wikipedia.org/wiki/Todesopfer_rechtsextremer_Gewal...
I'd say that Germany is still pretty safe, but I admit that there are places that even I as a German feel uneasy about - mostly the rural areas in former East German states.
Also the way asylum seekers are treated here seems pretty bad. But that refers to the way the government handles the issue, not to the attitude of the general population.