You don't even need an objective measure. It's so deeply ingrained people don't even think about it. For example, Americans will refer to someone from another country by their nationality. "He's Canadian" or "he's German." In Bangladesh, everyone not from Bangladesh is "bideshi"--"foreigner."

And if you're "bideshi" you'll never be "Bangladeshi." A white person can live in Bangladesh their whole life and never be "from there." But at least they generally respect white people. Hang around an immigrant community somewhere like Toronto and get folks talking about black people or Jewish people. Ask a girl's parents about how they would feel about her marrying a black person. You won't get a more negative reaction anywhere in Alabama.

As to the issue of sexism--I don't think it even needs saying.