To assist me at the event, I hired a temporary worker. I’ll call her Jane. She was a typical progressive who had moved to Portland from another state. But Jane, who is white, complained the city was a little too “white bread” for her, and she longed for a place with more racial diversity. Needless to say, the crowds attending this event were ethnically diverse. But as the days went by, I noticed something interesting. Whenever any African-Americans entered the booth to look at my products, I treated them like any other visitors (polite, friendly, professional). But Jane would go...