I just watched the video again. I have not read the book you mention, but I have read a book by Harris about free will and his "Letter to a Christian Nation". I didn't like either, in fact I'd say it's a case of I want the time back please.
A key quote in his speech there was his comment that, "some ideas just need to be excluded", or along those lines. What does he mean by that? Does he mean literally ban certain ideas? If so, we have a dictator. If not, if he simply means that we should all agree Ted Bumdy was bad - we do that already. We don't need science to tell us that. In fact it's not clear how science can tell us that.
Either Harris is saying that the idea that Bundy was good should be banned, which is ridiculous, of he is saying that we should all agree such an opinion is wrong, which is obvious. Most of what Harris says can similarly be divided into the obvious and the ridiculous.