The Cathedral interprets this as reflecting perceived (if necessarily nebulous, since it's seemingly impossible to ever isolate, pinpoint, and verify) irrational discrimination based on race. The assumption, at least among non-whites, is that the problems a group perceives between themselves and members of another group is the result of the latter group's hostilities towards the former group. Blacks feel more tension between blacks and whites than whites do. Ergo, whites are more irrationally racist against blacks than blacks are against whites.
In reality, however, the amount of perceived discord should be seen as a measure of hostility, bitterness, and acrimony members of one group feel towards members of another group. For ease of comprehension, the harmonious sentiments scores for non-Hispanic whites, non-Hispanic blacks, and Hispanics, computed by taking the percentages of respondents who responded "very well", adding 10 to that number to reduce the potentially bemusing high number of negatives, and subtracting from it the percentages who responded "not too well" or "not at all well" follow. The higher the score, the warmer and more affectionate the feelings of the group being examined towards members of the other two groups:
Whites' sentiments towards blacks: 6
Whites' sentiments towards Hispanics: 4
Blacks' sentiments towards whites: 1
Blacks' sentiments towards Hispanics: 13
Hispanics' sentiments towards whites: 5
Hispanics' sentiments towards blacks: -11
In sum, whites and Hispanics feel about the same about one another. Blacks have more issues with whites than whites do with blacks. That's the successful result decades of agitprop--blacks perpetrate a lot more harm against whites than whites do against blacks, but whites are persistently encouraged and coerced into feeling as though they owe something to blacks.
Finally, Hispanics are a lot colder towards blacks than blacks are towards Hispanics, by far the relationship with the least parity among the two groups concerned. In Central and South America, being black isn't something to be proud of and Hispanics don't try to associate with blackness. Many blacks may see Hispanics as potential anti-white allies, but Hispanics aren't that interested in sharing anything with blacks. As the number of Hispanics continues to grow and they become the clear senior partner in the minority coalition, blacks are going to find themselves increasingly forced into taking a backseat (heh) in the perpetual game of shaking out white concessions to non-white minorities. It will be interesting, if depressing, to see whether or not blacks take it sitting down.
Parenthetically, these are measures more of the sentiments of people on the ground, not among self-appointed NAM leaders and leading white ethno-masochists, who for self-interested reasons want to do everything in their power to see the non-white minority stay united against its white oppressors as it grows in size and shifts in composition.