Here is a section of the review I really liked:
Unfortunately another key foundation of his thesis, that Muslims along with Christians, are commanded to love their neighbours (pp.14) is simply an illusion. The Qur’an nowhere tells Muslims to love those who are different from themselves. Allah does not love such people (apparently He only loves Himself), so why should Muslims do so? There is only a single mention of preference for others and it is not unequivocal. There are two collections of the Hadith which are seen as sahih or ‘authentic’. In Muslim bin al-Hajjaj’s collection, which Volf quotes, it is rendered as: “None of you has faith until you love for your neigh bour what you love for yourself” 8 (p.105) Al- Bukhari’s collection of the Hadith puts it like this: “The Prophet said, ‘None of you will have faith till he wishes for his (Muslim) brother what he likes for himself.’” (al-Bukhari 1:12) Muhsin Khan’s translation of al-Bukhāri’s Hadith occasionally contains bracketed insertions. Through their use, he identifies between the most likely meaning. In this particular case, the term “brother” is judged to apply only to fellow Muslims.
Powers is rightly pointing out that Islam, at best, has a golden rule that applies only to fellow Muslims.
Read the whole review HERE.