There are 3 forms of AA;
1. preference given amongst equal candidates
2. preference given amongst minimally qualified candidates
3. preference given solely by race or gender despite qualifications.
Few would argue against #1. Many would agree with #2 but the devil is in the details of what 'minimally qualified' means. #3 is supposedly condemned by all, and is in fact considered illegal.
Why then do elite schools choose #3 to grant entrance to most of their minority students? Google 'Sander & Law School' to find copious information that unqualified minority students are admitted, only to perform as poorly as their grades would suggest.
Some make the comment that white women are the largest beneficiaries of AA. This may be true (I dont know it to be a fact) but the difference in the quality of the pool of women to the general pool is not as pronounced as the difference in the pool of minorities. Women receive AA due to forms #1 and #2, whereas minorities (especially blacks) receive AA due to forms #2 and #3.
So you are implying that every minority filled position (especially blacks) is only determined by AA? And at that illegally? The assumption that blacks are too incompetent to hold any qualified position in the workforce is racist. The inherent inferiority of minorities (most notably blacks) is clear in your post.
The Sander's study you posted only touched on one facet of AA. The black/white dichotomy. They are not inclusive of Affirmative Action admission policies based on gender or minorities as a whole, all eligible beneficiaries of AA policies.
The impact AA has on whites is also negligible. For years blacks were denied a chance to even participate in the race. And when a portion of 13% of the total population are given that opportunity, whites are calling reverse racism. Without a doubt the real racists are being exposed.