Racism runs deep in my home state, fo sho.
Most of it is rural as hell, and since the natives have mostly been decimated, it’s down to the immigrants who settled there, which are majorly white northern-europe types (germanic, nordic, irish), and have been around for long enough to not think of themselves as immigrants.
The biggest challenge to bias is familiarity, and most of Wisco is sadly unfamiliar with black people.
It’s the same thing that happens in rural communities…the world over, I’d imagine. It’s why horrible racism is still a thing.