The laughter surprises him. It's not unkind though. He listens, doesn't argue that it might be idealistic, and feels some hope that the man considers it all the same. But then he looks embarrassed.

"Oh, uh. You know. Where people come from, what they look like, anything someone decides to be or can't help being... people find reasons to treat each other badly for about any-- wait. Aren't you...?"