[lwd]

So... any black person with the last name of "Miller" can't buy .22 rifles at Dick's Sporting Goods.

Got it.

[free me]

That is a rather bizarre conclusion you came to.

Rather, a black guy named Miller trying to buy the exact same gun that another black guy named Miller tried to buy earlier from the same chain, and was found ineligible, is considered suspicious enough by the protocols of the licensing agency for the store to refuse the sale.