Guess that's where we disagree. We make instant decisions all day, and as Gladwell points out in Blink most of the time when we "spend more time seeking out other examples" it usually leads to just solidify our original decision in the first place. Not always, but most of the time. Even so, they still deserve to voice their personal opinion.
So in the same vein, a racist who has only ever met one asshole deserves to spout bullshit rhetoric about how he's superior to an entire race?