The Guardian today publishes this letter [2] in support of Julian Assange.

Most sensible and liberal people will find something to endorse in the letter. Although the moral certainty of some of those involved in or supportive of WikiLeaks can be off-putting – and I, for one, am glad that their fingers are on "To publish" buttons only, rather than any others – there is no doubt that they are facing sustained and hostile actions intended to undermine their activity.

But at the end of this letter of support come demands that are flatly, horribly wrong: "We demand his immediate release, the dropping of all charges . . ."

No. This is a person accused of sex offences and against whom there is a European Arrest Warrant. It may well be that he will be able to defeat the attempt to extradite him, or it may be that he will be cleared of the allegations, or acquitted of any charges if tried. But as it stands, he should not be treated any worse or any better than any other person accused of such offences who is subject to a live extradition process.

When the allegations first broke back in August, it was immediately clear that many of his supporters were rushing in to smear or dismiss the complainants casually [3]. This was an ugly and unfortunate reaction which, if anything, has intensified. Many observers – and not only feminists – are rightly disgusted by this display of instinctive or intended misogyny (including a great piece today by Libby Brooks [4], also in the Guardian).

Just as in August, the complainants deserve to be accorded respect. Assange, in turn, should have the benefit of the presumption of innocence. And, unless there is a good basis for defeating the extradition proceedings, there should now be a speedy procedure that will either determine any guilt or clear his name.

All this is simply "due process" and, once upon a time, well-meaning liberals wrote letters to the Guardian in defence of this liberal value, too.

David Allen Green is a lawyer and writer. He is legal correspondent of the New Statesman and was shortlisted for the Orwell Prize [5] in 2010.