I'm glad you posted this, because I have a couple questions for proponents of this sort of thought on which I've never been able to get a straight answer.
So, when black people are turned down automatically for a job position, I can see the benefit, in that there's less competition for any job spot. A white individual doesn't automatically benefit from this, but as often as the more qualified candidate was the nonwhite that was passed over, the white candidate benefited. Granted. Insofar as people will only hire whites, whites benefit.
That said, how did Bob's grandparents benefit from the bank being shady to black people? Now that banks are less racist, have they stopped loaning money to otherwise qualified whites? If Bob's grandparents paid their mortgage successfully, then did they benefit from black people being shit on, or did they just benefit from the bank making an accurate assessment of their ability to repay their loan?
How did Bob benefit from that black girl getting arrested? If black mustache had let that girl off with a warning, would that somehow have obligated blonde mustache to throw cuffs on Bob? If there's a law on the books somewhere that says that for every white person let off with a warning a black person must go down in their place, I haven't seen it.
I keep hearing and reading this argument that all white people benefit from the oppression of people of color, but in most of these cases, I'm not seeing it. When I've been arrested in the past, not ONE of my white friends, acquaintances or family members have ever received a boon of any sort from it, near as I can tell. Perhaps you can explain to me where I'm mistaken?