In his magisterial Exclusion and Embrace [...], he demonstrates, with sharp examples from his native Balkans, that it simply won't do, when faced with radical evil, to say, 'Oh well, don't worry, I will love you and forgive you anyway.' That (as the 1938 Doctrine Report already saw) is not forgiveness; it is belittling the evil that has been done. Genuine forgiveness must first 'exclude', argues Volf, before it can 'embrace'; it must name and shame the evil, and find an appropriate way of dealing with it, before reconciliation can happen. Otherwise we are just papering over the cracks.From N T Wright's article 'The Cross and the Caricatures'
In Islamic doctrine Allah can and may forgive sins, even great sins. There are actually ways to force the god if Islam to forgive your sins (ie, dying in jihad). But there is now way to account for the enormity of sin in Islam. Allah just lets it go, winks at it, and that is that.