The Love of God

In the September 2010 issue of the New Oxford Review, there is a review of Between Allah & Jesus: What Christians Can Learn From Muslims by Peter Kreeft. I think Professor Kreeft tends to go overboard in his enthusiasm for ecumenical outreach and finding common ground with Muslims. The review likely gives an adequate characterization of the weaknesses of his latest book. It lead me to ask again whether the Koran and the Islamic tradition(s) speak about the love of God. Journet and others have talked about Islamic mysticism; Journet links it to the workings of grace despite the errors of non-Christians. But do Muslims (and rabbinical Jews, for that matter) have a proper understanding about the love of God, and how grace is necessary for it? And can duty (or the submission of will) and habit explain the living practice of many (or most) Muslims? (Certainly habit can explain the habits of lukewarm Christians or Christians in the state of mortal sin.)