I'd wager for tourists it's very safe in Germany.
Unless they're Black or "look Muslim", in which case I'd stay the fuck out of Eastern Germany. There's more recent reports as well, e.g. [1] - and it's been a massive issue for Eastern Germany, especially since the rise of Pegida [2].
But don't get me wrong, Western Germany also has its no-go areas, especially anything rural. The large cities tend to be decently safe from far-right violence - but even the smaller ones can be dangerous. Just last week a friend of a friend and her child was attacked in Landshut near Munich by a drunkard (and no it's not hearsay, there's a police report).
[1] https://www.mdr.de/nachrichten/sachsen/dresden/dresden-radeb...
[2] https://www.zeit.de/politik/deutschland/2015-10/pegida-dresd...