Every once in a while you read something and say "Just Damn! This guy has pegged it!"
This article in EuroPundits by Nelson Ascher is one of those kind of articles. He posits that the fall of the Berlin wall left European socialists and the general left as orphans without a cause. To fight for something is simultaneously to fight against whatever threatens it, and thus, the leftists were anti-Western and anti-Americans too, anti-capitalistic in short. Without a "home base," they have simply morphed into a virulent anti Americanism, with nothing to be FOR, but only resenting and loathing the ideology replacing USSR communism, or its Maoist counterpart.
Now, whatever they wanted to defend or protect doesn’t exist anymore. They have only things to destroy, and all those things are personified in the US, in its very existence. They hate the USA, but have no world power to threaten it. Thus the left's nascent alliance with the most UNLIKELY of world powers, radical Islam.
Read the link. It is one of the best and most incisive articles I have seen in a while.