In the spirit of bringing evidence to the hearsay and opinion party, how about some dated articles that predate Amaral's book? If these articles are out there and being discussed at a time before the book appears on the scene, how can Amaral's book be blamed for whatever it is he's currently being blamed for?
A few links to articles. I'm neither condoning nor condemning the articles, merely demonstrating what was being discussed widely long before Amaral's book.
Item 1: September 13th, 2007
http://aconservatives.blogspot.co.uk/2007/09/how-mccanns-killed-madeleine.html(for the sensitive among you, it's not what it appears from the article title)
Item 2: September 9th, 2007
http://uk.answers.yahoo.com/question/index?qid=20070909155458AARSGMGItem 3: Various - between September 2007 and February 2008 I think
http://www.helium.com/debates/100229-thinking-the-unthinkable-did-madeleine-mccanns-parents-kill-her/side_by_sideItem 4: October 2007
http://www.martinfrost.ws/htmlfiles/oct2007/disliking_mccanns.html(I find this quite an interesting article. Pros will hate it as it explains the lady's thoughts towards the McCanns cogently and expressively and is obviously written by an intelligent person therefore not fitting the "thick [ censored word ]"-shaped hole they like to store such people in normally.
Item 5: September 2007
http://www.today.com/id/20726999/ns/msnbc/t/rumor-vs-evidence-madeleine-mccann-case/There are dozens - if not hundreds - of such articles and opinion pieces all dated before 2008. Many of them discuss hiding bodies, fridges, DNA, cars, the church, you name it... I don't see how this can be blamed on Amaral's book as it hadn't come out by the time these articles were written. What seems more likely from the articles is that the Arguido status kicked off the change in public perception/feeling.