Would it not make much more sense to accept that there are fundamental and irreconcilable differences between Christianity and Islam and simply give up all that useless quest for points of theological agreement? Who cares if we agree on the secondary if we categorically disagree on the primary? I am all in favor of Christians studying Islam and for Muslims studying Christianity (in fact, I urge them both to do so!), and I think that it is important that the faithful of these religions talk to each other and explain their points of view as long as this is not presented as some kind of quest for a common theological stance. Differences should be studying and explained, not obfuscated, minimized or overlooked.