Of course The Guardian will say that this is part of the "Comment is Free" section (see image above); which "allows diverse points of view". No it doesn't! It allows Islamists, as well as hard-core Trotskyists..., etc., to state things which even The Guardian daren't claim for itself.
If "Comment is Free" were genuinely free, they would have published articles by the BNP, UKIP, the EDL, Gert Wilders, etc; which, of course, it never has. Alternatively, what The Guardian has repeatedly done over the years is equivalent to The Telegraph or the Daily Mail allowing their own “Comment is Free” sections to be written by the English/American Nazi Party or by the National Front. And, of course, if these newspapers ever did such a thing, The Guardian would be on their backs in no time. (The Guardian has recently made much of a Daily Mail article which praised Mosley's Black Shirts some 90 years ago.)
Over the last ten years or so, The Guardian has published articles by at least 40 or more Muslims: most of whom - though not all - have been outright Islamists (e.g. members of Hamas, Hezbollah, the Egyptian Muslim Brotherhood, MCB, MAB, Salma Yaqoob, etc.).