zlacker

US states share significant amounts of culture, including attitudes towards minority groups, and moving between them doesn't make as much difference as you'd expect if they did not.

The majority of a country finding discrimination unacceptable isn't necessary to pass anti-discrimination laws - just that most people don't care whether someone gets discriminated against or not. If you don't care (or need the job to survive yourself), you'll do whatever your boss tells you to do, and you're hardly going to boycott a store for discriminating against someone else, which means a subset of the population has disproportionate impact.