You can read the first chapter of the book.
I haven't read this book (I'd like to!), but I can say right now that in order to overstate a problem you have to understand its real nature. And that in and of itself is an enormous task for governments all over the world -- to fully understand the level of threat coming from secretive organizations, cells, groups of people or individuals who would like to take those institutions off guard. It sounds cliched, but "better safe than sorry" is what we will hear an awful lot when we are talking about measures to protect people against new and misunderstood threats.