Mentch

I was very touched by a picture posted on AOL this week, showing a hooded African American man who had fallen asleep on the shoulder of a yarmulke-clad Jewish man on a New York subway. The picture went viral as many saw it as a restoration of real humanity in a place we all least expect to see it, and it was one of the rare instances when something nice actually makes it to the news! Was this religious Jew’s action (or inaction, by not moving and letting the man sleep on his shoulder) based on a teaching of Judaism, and if so which sources?