If people on the US were really liberal (in the original "capitalism of the free" sense), racism wouldn't even be an issue. People wouldn't care so much about race, and your genetics would be more as a "fun fact" rather than some central piece of your identity.
Also, they wouldn't care about atheists so much. Liberals may not be atheists themselves but they would be very detached from religion and "who whorships who". People wouldn't take religion so seriously.
The US is more like a bunch of conservatives trying to be liberal until their own beliefs trump liberal theory.