If you want to understand the Left, the best place to start is with an understanding of hysteria. Leading leftists either use hysteria as a political tactic or are actually hysterics.
Take almost any subject the Left discusses and you will find hysteria.
No event is free of leftist hysteria. On the third day after Katrina, civil rights activist Randall Robinson reported that blacks in New Orleans were resorting to cannibalism. Indeed, most of the news media coverage bordered on the hysterical. Not to mention the hysterical predictions of 10,000-plus dead in New Orleans.
But the irony in all of this is that the Left sees itself as the side that thinks intellectually and non-emotionally. And that is hysterical.