While I mostly agree the German police still has a racism problem. According to this article since 1993 a total of 138 poc died in police custody. https://www.volksverpetzer.de/aktuelles/schwarz-sein/
Yes it is comparatively low but these are still 138 deaths.
Definitely!
But maybe there's a way for a more nuanced discussion than saying that "all cops are bastards".
For me it becomes systematic and institutionalized oppression when racist incidents happen and they are swept under the rug and not properly prosecuted which seems to be exactly what is happening here.
I am not sure that it is purely racially motivated that cases are not being properly investigated. Take police violence against soccer fans, for example. Organised soccer fans in Germany are usually not from minorities. Yet there are often reports of unnecessary police violence. Especially from a couple of notorious police units. These cases (which are, of course, not about murder) are also not properly investigated. I think the issue is more than police officers cover each other too much. Or higher ups sweep it under the rug to avoid it becoming a political issue. Here I'm only talking about the investigations, not the murders/killings/detahs themselves. I can easily believe these to have a racist motif.
Germany's racism problem is rather notorious, de-nazification couldn't scrub every corner and going from 100% to the current low support for Nazis was already a huge success but we must remain vigilant as they will always return, they will always seek positions of power and they will always abuse those positions. The police and military must be regularly screened and investigated to find the Nazis. And of course there's a lot of more subtle racism than outright Nazis. The average German still carries a lot of prejudices and hate, not "gas all Jews" level but enough to make us act worse towards minorities and that accumulates to the same structural shitshow that we see surface in the US. Holding minorities down through constant worse reactions, be it for police behavior, job interviews, rental offers, whatever. Anything that requires personal judgement is quickly tainted by prejudices even if it's not a conscious act.
You can even add another dimension to Germany's racism problem: Racism among minorities.
Antisemitism is a big problem among recently arrived migrants from the Middle East.
German fascists then pretend to care about Jews and use it as ammunition against immigration.
How do you educate people from a completely different culture that parts of their deep-rooted world views are wrong?
Or take the smouldering conflict between Kurdish and Turkish people living in Germany.
All those conflicts among minorities in turn is fuel for German racists who think they should all fuck off to their home countries.