Parts of the world, including that universe onto itself of the New York subway, have tipped over into Theatre of Rage. The lastest performance art in that is the attack on Orthodox Jew Haim Ovanonou. That happened on the subway platform of the Williamsburg Marcy stop. Here is the coverage in the Daily News.
Could hard times be triggering this ethos of hate, just as they did in Germany after World War I? Feelings are becoming brittle toward those who aren't perceived as "fitting in."
Those range from conservative Jews to the homeless. Regarding the latter, here is sunny Tucson which should be a sort of Paradise, neighbors call the police if the homeless are taking a snooze on the bench at the bus stop. But the sun doesn't buy groceries and too many people don't have work.
In the stalled economies of Japan and Europe, I guess we should expect hate crimes to escalate.