I myself have not read it but I've gone to the online commentary of the book's detractors in search of support for your extermination claim and have, so far, found none.
http://www.freerepublic.com/focus/f-news/1184110/posts
http://www.freerepublic.com/focus/f-news/1208187/posts?page=1,50
There is one more (it had 500+ replies IIRC) and I haven't found it yet. Give me some more time.