DEI makes racism rational
If race is included as a criterion of consideration to give someone a job, then it becomes rational to judge people’s ability to perform at that job partly on their race.
For everyone who got the job, this was due to some combination of being qualified and being of the right race. We might say that someone’s qualifications can be ranked from 1-5, with 1 being completely incompetent and 5 being world-class. A final score is computed by adding this qualification level to either 1 or 0 depending on whether you are of the right race or not. To get the job, you need a final score of 5.
The question is how qualified should you expect someone to be given their race and the fact that they got the job. The fact that they got the job tells you that their final score was 5, but this isn’t equivalent to their qualifications. You can use their race to figure out their true qualification level. Among the people who are of the wrong race, their race added nothing to their qualifications, so their expected qualification level is exactly 5. Among the people who are of the right race, some of them are 4s who got a 1 point boost from their race and some are 5s who would’ve gotten the job anyways. The expected level of qualification is therefore less than 5. Thus it would be entirely rational to expect different levels of performance based on race.
Leftists often pretend not to understand this (I expect to see this behavior in the comments), but this is just them being bad faith. They’re not so stupid that they can’t grasp such a simple concept. If they think it’s bad for people to make assumptions about someone’s ability based on race, then they should be in favor of eliminating DEI and affirmative action. Anything other than pure meritocracy makes it rational to judge based on race and other demographic traits.