Reading the Bible through the lens of Jesus Christ is indeed the way to go. But to use Jesus against the God of Israel he worshiped and prayed to and loved and obeyed pits us against what Jesus himself is doing.
And he ends his article with this:
The flow of the Bible is not neat. It doesn't fit into an evolutionary scheme. There are as many mercy passages in the Old Testament as there are grace-and-love passages in the New. What's more, passages about God's grace stand side-by-side with passages about God's wrath (e.g., Hosea 1-3; Matt. 23-25). The evolutionary approach doesn't work because that's not how Scripture's narrative works. There is wrath in Revelation and there is covenant love in Genesis. And Jesus talks more about Abba and hell than does the rest of the Bible combined.
Unfortunately, this book lacks the "generosity" of genuine orthodoxy and, frankly, I find little space in it for orthodoxy itself. Orthodoxy for too many today means little more than the absence of denying what's in the creeds. But a robust orthodoxy means that orthodoxy itself is the lens through which we see theology. One thing about this book is clear: Orthodoxy is not central.
Alas, A New Kind of Christianity shows us that Brian, though he is now thinking more systemically, has fallen for an old school of thought. I read this book carefully, and I found nothing new. It may be new for Brian, but it's a rehash of ideas that grew into fruition with Adolf von Harnack and now find iterations in folks like Harvey Cox and Marcus Borg. For me, Brian's new kind of Christianity is quite old. And the problem is that it's not old enough.
Sometimes when I read McKnight himself, such as his Blue Parakeet], it appears he is straying from the bounds of orthodoxy, but in this article he shows which side he is on. He certainly nails his colours to the right mast.