The “superior race” people are often the worst representation of their respective races.
Fat, riddled with preexisting conditions, substance abusers, poorly educated, dirt poor, poor hygiene, etc.
They need to derive some form of solace and “pride” in their racial identity because their own personal identity is so horrifically lacking. Their existence is a reminder to them of how inferior they are as a person, and thus need to become “superior by proxy” by creating an idealized and wholly unobtainable representation of their race.
And it has to be virtually unobtainable, because if the goalpost was somehow within reach, it would mean they were acknowledging that they are too lazy or inept to reach it.
Meanwhile, given that there are no exemplars of their “perfect” specimen, they have to cling to those that preach them “in principle”. Which is why they always fall in love with loud, angry racists who scream about all the “perfect” parts of their race while exemplifying none of them.