This is kind of off topic, but if you read the law (I've had to at various times), the bar owner is liable if he accepts a fake ID. So once he's determined that the ID might be fake, there is no legal or operating reason for him to take any risk and accept that ID, especially in a college town, especially when the person is clearly close at best to the legal age limit. Every training manual would DIRECT the bouncer (owner in this case) to reject the ID and refuse admission. There is simply no payoff in accepting it - he can lose his license if it's proved fake, and the downside is one kid doesn't get in the bar. Easy decision for a bar owner in a college town.
And I guess I disagree that there is zero evidence this is about race because it was such a quick turnaround from polite and cordial kid at the pub to forcible tackle and bloodied face, when no one has alleged he swore at them, resisted arrest, etc. I've heard too many black men who I respect and who are professionals talk about Driving While Black or Shopping While Black, and the point is they do not get any benefit of the doubt, but white guys in a college town full of rich kids of important people often DO.
I haven't alleged racism, but I can't at all conclude there's no evidence race played a role. I've lived in Charlottesville and race relations when I was there were poor.