Sci-fi author SM Stirling (writer of Island in the Sea of Time, and the Draka series) has had some of his books published by Baen, and I have seen him express some virulently Islamophobic views on Usenet and on weblog comments.  One of the most disturbing was posted recently on the weblog of Charlie Stross (another sci-fi author, from Edinburgh), which concluded with "There's a lot of denial about this (the nature of Islam), because the implications are fairly grisly. The implications don't make it any less true, however."  A poster on the alternate history Usenet newsgroup also tried to organize a boycott of his book The Peshawar Lancers in protest at anti-Muslim statements he had made on Usenet.