Well, I just have to take issue with the "Christian-bashing" comment, and I hope I can do it in a grandma-friendly way (Mods, please do let me know if it's inappropriate).
I understand that you don't like the blog, and I'm not going to try to convince you further. But I want to address the issue of what the purpose of the LB posts is, which is to point out broad thematic elements within the book that are not only ridiculous from a literary perspective, but also in their own right anti-Christian.
Now, there's no way for me to go into those points in this forum (though please feel free to email me off list), but I think the author's point is not to "bash" Christians but precisely to defend what he sees as that which is "legitimately" Christian from that which is not. Now, you and others can of course disagree with him on that. I happen to agree. But again, we won't resolve this here, so I suggest we move on.
Now, what I find most valuable about Slacktivist's LB entries is that they enable me to understand both what it is about the novel that is compelling to many people, and also what it is about the novel that's so wrong, from a literary perspective (I already think I know what's wrong from a religious perspective).
Its by pointing out that people simply WOULDN'T act the way that these characters act in this situation, that they wouldn't say what these characters say or do what they do, and that to postulate characters who act this way is to imagine some very strange people, that those posts are of most value to me. If it were just some guy ranting, as you put it, I wouldn't be interested. But he's not ranting, he's analyzing, and as I think his analysis is dead on, I look forward to it. More to the point, because he's funny and insightful, I look forward to it.
But, as I say, to go into more detail isn't possible here.