Two brief excerpts:
I can tell you, without hesitation, that the vast majority of those who embrace form and redaction criticism in all of its flavors and kinds do so out of tradition, not out of having examined the case set forth in defense of these methods. In fact, very, very few of those who glibly repeat the party line have ever even given thought to any other viewpoint. Anyone who thinks there is a fair, open dialogue in “the academy” over these topics is simply misinformed. To “get ahead” in Christian scholarship you must—not should, MUST—toe the line when it comes to the acceptance of form and redaction criticism, along with its underlying presuppositions, presuppositions that are almost never explained, let alone debated, today.
He would not wish us to begin with the assumption of error and inconsistency on the part of the Qur’an, yet his entire argument against the gospels does just that. When he defaults to Brown or others like him, who themselves operate solely in the realm of redaction and simply dismiss as out dated and irrelevant the need to harmonize (not on a surface level, but on a much deeper level that is consistent with meaningful historical inquiry), he is doing the very thing he cannot allow to be done when it comes to the Qur’an. And this is the continued inconsistency of Shabir Ally, an inconsistency that he has imbibed from those who have come before him.
Covenantal apologetics in the field of textual criticism is found nowhere more clearly today than from the pen of this author. You would also be hard-pressed to find a more experienced debater. I recommend his work quite highly.