Racism, or the lack thereof, is so sensitive a question because it cannot be discussed openly and honestly. Whether or not a person prefers to mingle and marry people of their own race or culture should not be seen as a reflection of their character or decency.
The test should be do we treat all humans with same amount of respect WHENEVER we make contact. I have literally hired hundreds of whites, blacks, browns and others over the last 30 years. I never paid any of those PEOPLE differently, or treated them differently based on their appearance. This is the true test.
That's because, when spoken about the "protected" classes, TRUTH is the new HATE SPEECH.