Shenango - the very diffrence of the point of view is the issue. Both Muslims and Christians view their point of view as authoritive and hence correct. It is human nature to do so, for who will hold to an opinion which they think is wrong?
Hence it becomes obvious from a human perspective that Gabriel seems to change sides (not to say that this is the case in an absolute sence, but only in a perceptive one). However, it is this very diffrence in perspective that hinders a true understanding between muslims and christians (I do not say peace because I believe that peace is based in the value of the individual, personal humility, and paticient endurance).
When each side assumes that it has a monopoly on the truth then understanding is hard to achieve because no true dialoge can be achieved, but understanding that we each see things from a diffrent perspective (the true nature of that perspective being obscured due to the time elapsed since its conception), and that these things are the same things (in an absolute sense), suggests that all of the children of God must eventual strive for unity in the truth which God himself illuminates for us.
That being stated, I wish to understand the diffrence in the point of view.
Know the truth and the truth will set you free.