I tend to agree with the starting point of many of this
guy's theories, but have serious disagreements with the eventual
conclusions - which is informed by my opinion that there is a lot
that is carefully left out of the analysis.
The big hidden assumption seems to be that having large numbers of
children is a good way to get, a couple of decades down the line, large
numbers of adults who share even your extreme beliefs.
Unless fundamentalists are able to successfully position repression as
a natural response to some sort of collective threat, I would predict
that many of them are doomed to disappointment, when their children
grow up to be more cosmopolitan than they had hoped.
-Dave