I agree that personal experience can be very effective at ameliorating people's anxieties about other people. A few years ago, someone was able to conduct a study by way of a fortunate coincidence. I can't remember the details now, but there was a White community that had a sudden influx of Latinos, I think somewhere in the Pacific Northwest, and the people who did the study were able to conduct surveys of the White residents' attitudes towards Latinos before and after the two groups getting to know each other, and the results were notable, if not dramatic. But clearly, it's impractical to expect people to get to know a "representative sample" of every other subgroup of humanity. We need to be able to not lose our minds when dealing with people we don't already know and understand. I worry that if getting to know other people is our only way to combat fear, intolerance, and hysteria, then it will never end - it'll just change shape, like the monster in The Thing. A century ago, it was Italians and Catholics; today it's transgendered people and Latino immigrants; and apparently people are attacking Asian-Americans again..? I mean, WTH... So there will be another group of people tomorrow who seem too different or too threatening, for no real reason. I don't know who they'll be, but bank on it. Maybe, as with Asians, we'll go back to demonizing and attacking some of the people we thought had assimilated, like Catholics and Eastern Europeans. 'Round and 'round we go. If we don't get better at this, it'll just keep happening.