yea, people dont really really understand that the rural north is every bit as fucked up and racist as the rural south.
Since you dont live in the US and very clearly arent a scholar of racism or US culture, let me try to explain this to you. Against my better judgement.
Racism isn't just a bunch of hooded assholes burning crosses in black peoples lawns. It's baked into Americas political, legal and social existence. Our constitution, for fucks sake, recognizes black people as only 3/5ths of a person. The vast, *vast* majority of our nations founders were slave holders. Racism is very much a part of America in more than just a "some racists live here" kind of way.
You gotta also get beyond "racism is one person explicitly hating another person for their skin color" and recognize that racism is better understood as a system set up to privilege one race over others by providing access to power for some, while using that power to deny advancement and privilege to others. Typically referred to as something like "institutionalized racism"
Racism in America looks like cities paving over black neighborhoods to build highways specifically designed to segregate cities (see I35 in Austin, TX or I630 in my city, Little Rock). It looks like redlining in home mortgage loans. It looks like electing the first black president and then him overseeing the greatest transfer of wealth *out* of poor black communities and into rich white hands since they burned Tulsa (feel free to google "tulsa race massacre").
There's a lot of glitter around more overt racial issues in America. The KKK, Neo Nazis, etc. But racism... the actual institutional racism that holds up the power structure that reinforces those assholes, its more subtle but no less deadly.
So when George Floyd was murdered, it was a product of that more subtle racism. Chauvin may or may not be overtly racist. I have no idea. But his training and the training of most cops is steeped in it, just like every aspect of American culture is.
Im running out of the desire to keep talking about it. But if you're curious, two very easy to understand books you could read on it are A Colony In A Nation by Chris Hayes (quite specific to this conversation) and We Were 8 Years In Power by Ta-Nehisi Coates (much more generalized examination of race/racism in america). I don't particularly agree with either of them 100% but theyre both pretty milquetoast, center of the road liberals so it's not like you'll have to wade through radical polemics.
Anyway, enjoy.