Wow. Peter Tatchell gets it spot on in his remarks on the blog associated with today's March for Freedom of Expression:

Sections of the left moan that the rally is being supported the right. Well, if these socialists object so strongly why don’t they organise their own demo in support of free speech?

The truth is that is that some of the left would rarely, if ever, rally to defend freedom of expression because they don’t wholeheartedly believe in it. Mired in the immoral morass of cultural relativism, they no longer endorse Enlightenment values and universal human rights. Their support for free speech is now qualified by so many ifs and buts. When push comes to shove, it is more or less worthless.

As a left-wing Green, committed to human rights and social justice, I do not share the politics of some other speakers and rallyists. But this is the whole point of Saturdays’ demo – to defend the free speech of those with whom we disagree.