My last post discussed a scale that is usually referred to as "racial resentment." The questions (all with responses going from strongly agree to strongly disagree) are:
1. Generations of slavery and discrimination have created conditions that make it difficult for blacks to work their way out of the lower class.
2. Irish, Italian, Jewish, and many other minorities overcame prejudice and worked their way up. Blacks should do the same without any special favors.
3. It's really a matter of some people not trying hard enough; if blacks would only try harder they could be just as well off as whites.
4. Over the past few years, blacks have gotten less than they deserve.
I'd say that the first question simply measures perceptions of how much racial inequality there is. It showed a strong trend towards "disagree" between 1986 (when it was first asked) and 2012. Even with the move towards "agree" in 2016 the correlation is about 0.8. That is, people see less racial inequality than they used to, which is reasonable given actual changes in society.
With the other three, the end that is scored as "resentment" can include two kinds of people--those who think that things are reasonably fair, and that blacks haven't taken advantage of opportunities, and those who think that blacks are getting some kind of unfair advantage. In terms of the last question: people who think that blacks have gotten about what they deserve and those who think they've gotten more than they deserve. So they are basically just measures of general liberalism versus conservatism on the causes of racial inequality. None of those showed a strong trend through 2012.
In 2013, I had a post about a question that seemed like a pretty good measure of resentment "For each of the following groups, please tell me whether you feel that they are receiving too many special advantages, receiving fair treatment, or are being discriminated against?" The groups included blacks/African Americans. I remarked then that unfortunately the question hadn't been asked since 2008, and it still hasn't. It also goes back only to 1990, so I took another look for questions that might be regarded as measuring racial resentment.
There is one question that was asked several times in the 1970s, and then reappeared in a very similar form in the 2010s. The 1970s version asked if they agreed or disagreed with the statement "the government has paid too much attention to the problems of blacks and other minorities." The 2010s version: "Over the past couple of decades, the government has paid too much attention to the problems of blacks and other minorities," with "completely agree," "mostly agree," "mostly disagree," and "completely disagree" as possible responses. If we collapse the 2010 categories into agree and disagree, the percent agreeing minus disagree is:
The figures for 1976, 1978, and 2012 are averages of multiple surveys (5, 2, and 3). Although the question wording differs, I don't think that could plausibly account for the difference in responses. It's reasonable to conclude that there's less racial resentment now than there was in the 1970s.
[Data from the Roper Center for Public Opinion Research]