The only thing necessary for the triumph of evil is for good men to do nothing

People in rural and conservative communities aren't bad people. And IME people in urban and liberal communities aren't even any less racist. The biggest difference is that those with power in urban and liberal communities (i.e. middle-class and whites) are more likely to acquiesce when confronted with claims of prejudice or inequality.

This propensity to acquiesce is considered radical by conservative communities, who view themselves as being principled.