As I have remarked before, the Left must have an enemy. Leftism cannot sustain itself without an enemy to hate. See Thomas Sowell, "The Anger of the Left":
But, for many on the left, indignation is not a sometime thing. It is a way of life.How often have you seen conservatives or libertarians take to the streets, shouting angry slogans? How often have conservative students on campus shouted down a visiting speaker or rioted to prevent the visitor from speaking at all?
The source of the anger of liberals, "progressives" or radicals is by no means readily apparent.
If it is hard to find a principle behind what angers the left, it is not equally hard to find an attitude.
Their greatest anger seems to be directed at people and things that thwart or undermine the social vision of the left, the political melodrama starring the left as saviors of the poor, the environment, and other busybody tasks that they have taken on.
It seems to be the threat to their egos that they hate. And nothing is more of a threat to their desire to run other people's lives than the free market and its defenders.Photo FOFB
Update: Hate is the Force that Gives the Left Meaning
When all enemies to the right have been eliminated, the left doesn't find peace. Its ideology is a weapon, its gurus are egomaniacs and its followers joined to fight. When it wins in an arena, whether it's academia or entertainment, the winners begins warring against each other proving that even in an ideological vacuum, its ideology remains a destructive force whose followers would rather denounce and destroy, than educate and enlighten.
As a victorious parasite writes its own obituary, a successful left is a threat to its own existence and the only thing saving the left from the violent disintegration into its own insanity is the right.
Hating the right is the only thing that keeps the left together. When it doesn't have Nixon to kick around anymore, it dissolves into a wet puddle of goo. If it didn't have Sarah Palin, Ted Cruz, Mitt Romney and every other figure who took his turn starring in their grim theater of the Two Minutes Hate, it would revert back to the petty infighting of a thousand minor eccentric causes.