Nick Cohen brings us an answer from Standpoint magazine about how the far left has joined the far right:
The Conservatives’ main complaint about the borderless Left used to be that it allowed huge double standards. Polite society embraced ex- or actual communists and Trotskyists and treated them with a consideration they would have never extended to ex- or actual Nazis. The refusal of 21st-century left-wing and liberal opinion to separate itself from radical Islam is, however, a living disgrace with disastrous consequences for Europe.
You can see them everywhere if you are willing to look. In January, for instance, Harriet Harman and Ed Miliband attended a “Progressive London” conference packed with the supporters of the Muslim Brotherhood, which believes in the establishment of a totalitarian theocracy. George Galloway, who saluted the courage of Saddam Hussein, was there too, inevitably, as was Tariq Ramadan, the shifty academic who thinks there should only be a “moratorium” on the stoning to death of adulterous women rather than an outright ban. Imagine the fuss if, say, William Hague and Michael Gove had gone to a conference on the future of right-wing politics in London and joined members of the BNP, a far-right politician who had saluted the courage of Augusto Pinochet and an academic who argued for a “moratorium” on black immigration to Britain. The BBC would have exploded. It, along with everyone else, kept quiet, of course, about Harman and Miliband because they were from the Left and therefore could never be beyond the pale.
Nominally left-wing politicians’ appeasement of religious reactionaries is so routine that it takes a convulsive event to reveal the extent of liberal perfidy. The reaction of University College London to the news that its alumnus Umar Farouk Abdulmutallab had tried to blow up a plane over Detroit on Christmas Day should have provided the shock therapy. The connection between British-bred extremism and mass murder was there for all to see, except that the authorities did not want to look.
I can see no more important task at present than working out how European liberalism has gone so badly wrong. Why does a culture that prides itself on its opposition to bigotry become so feeble when it confronts bigots dressed in the black robes of clerical reaction? Until we understand, we cannot cure, and there is an emerging understanding among those who worry about the dark turn liberals have taken that Western guilt lies at the root of their moral failure.
Ever since the Rushdie affair, the fear of religious violence has buzzed in the heads of liberal Europeans. The Islamists bombed London and Madrid, murdered Theo van Gogh, drove Ayaan Hirsi Ali into exile and forced politicians, most notably Muslim women politicians, to accept armed guards. On the scale of suffering in the world, Islamist violence in Europe is nothing remarkable. But a little fear goes a long way in rich and comfortable societies and sometimes the trouble with the liberals is not their guilt but that they do not begin to feel guilty enough about their cowardice and complicity.