HARD EVIDENCE?! HA Take off the tinfoil hat.
If you don't see the flaw in this argument, then I don't know what to tell you. Ok, maybe I do...
Problems: Small sample sizes, disproportionate number of white to black QBs, black QBs benched for other black QBs (EJ Manuel), mixed race QBs (Is Russell Wilson considered "black"? He's also a white QB), number of black backup QBs, etc. The list goes on.
There's so many holes in this argument, it's just meant to get you upset. Don't care. Let's talk about why there are no black kickers and punters?
Also, black people can only screw up once? How about Mike Vick? He seems to still be making millions, including a $100M contract after his incarceration, while the average man is left to work himself to the bone for peanuts.
I'm from Philly so this article really gets to me. This "expert" had a preconceived notion and then went around skewing numbers and considering certain factors until he could "prove" his point. This is not science nor intelligence, this is something done to get a reaction from people and manipulate feelings.
Like I said, I'm from Philly where we had Randall Cunningham, a few crappy white interim QBs (plus Rodney Peete), and then Donovan McNabb. Nobody ever got benched because they were black here, only because they stopped being productive. In other words, gtfo you social engineering hack economist writer. RG3 got benched because he sucked and couldn't stay on the field in the first place because he runs like a wounded animal and any NFL-calibre hit will put him out of the game.
This is a non-problem.
Cam Newton > your favorite QB.