Your bullet-points example doesn't appear to match your paragraph example. "Think people ought not to be racist; observe that they are" is different from "Imagine something is true; observe that it is not." I can imagine that people ought not be racist (they shouldn't) but be aware that they are. Then when I observe someone being racist, there's no conflict between my beliefs and reality. Instead, there's a conflict between reality and how I think reality ought to be, which I attempt to resolve by calling the racist out in the hope that they'll behave better next time.

Note that the above says nothing about whether or not I should call out the racist, just that I think epigeios' example is bad. Also I agree that it's a bad idea to be angry at concepts rather than the people who believe them.