I have a white friend who is married to a black woman. "Converts make the best zealots" certainly applies to this guy. He rants constantly that George Zimmerman proves that white racism is still alive and well. After reminding him that Zimmerman is Hispanic and that anecdote is the weakest form of evidence, I bring out the big guns: the General Social Survey.
Respondents were asked in 2002 how warmly or cooly do they feel towards blacks as a group. Answers ranged from "very warm" (1) to very cool (9). Among whites (sample size = 2162), only 11.4% percent gave a cool answer (answers 6-9). Only 2.3% said "very cool." (Blacks were asked the same question, and 5.9% gave a cool answer for fellow blacks.)
Next, I calculated median education and income for whites giving cool answers. It is 12.0 years of school and the income range between $25,000 and $29,999. So whites that don't like blacks are, on average, uneducated, and they have low status jobs. They don't run anything and so are in no position to deny blacks jobs, etc.
While we're at it, 15.6% of blacks (sample size = 405) feel cool toward whites. Four percent answered "very cool." And the share of whites who are cool toward whites: 4.7%.