Nothing to do with Islam

Hadith prescribing killing for insulting prophet

http://www.searchtruth.com/book_display.php?book=38&translator=3&start=0&number=4348#4348

Book Haram kills 2000 burns city of 10000

http://pjmedia.com/tatler/2015/01/08/nigerias-911-boko-haram-kills-2000-in-attack-on-baga-city-burnt-to-the-ground/