Most of Europe, but most disturbingly Germany (due to their dubious history), is having a huge resurgence in right wing politics, manifesting itself in intolerance of foreigners and ethnic groups. I think we have seen this before.
Name one country where locals do not have “some problem” with foreigners!?
I admitted that we still do have Neo-Nazis around but perhaps you should also look at why Germans (or locals in other countries) don’t really like foreigners.
I don’t want to justify any violence or other racist actions, but when foreigners come as a guest to your country and then start behaving like the have more rights then those born there and making demands while abusing the social welfare system (and the e.g. German welfare system is very generous indeed if you know how it works) you may also think not too highly of them.
Of course people will easily generalize and call all foreigners bad, even that’s not the case and some are beneficial to (or better: needed in) the country.
On the other side it’s so easy to just point the finger at Germany (due to our history) and though I agree that the genocide during WWII does probaly have nothing to compare it to racism exists nearly everywhere, surely in the US it does, too, and I think this is quite comparable.
However that does not mean that the Germans will start it all over again.
Also don’t forget last time this was carried out by the “government”, now the violence originates from small groups (a bunch of idiots IMHO).