Let me tell you a secret, most people even more so none Europeans use derogatory terms of that level daily in their private conversations. Considering the rape rates in the EU you can't begrudge some Germans having low opinion of Muslims.
So, er, I think your argument comes down to "sure, they're bigots, but most of the people I know are bigots too so stop complaining". I don't find this a very convincing argument.
(And "the filthy foreigners are coming for our women" is, like, the oldest accusation in the book. Don't forget to add that they also kill children to use their blood in their blasphemous religious rituals.)
[1] https://www.dw.com/en/new-years-eve-in-cologne-5-years-after... [2] https://pardok.parlament-berlin.de/starweb/adis/citat/VT/19/...
So, 61.5% of all suspected rapists/sexual assaulters were German.