and the inspiration for his attack was a book that's been called the bible of american white supremacists. it gave birth to a little known armed white rebellion that continues to this day. >> this is cold-blooded murder, any way you put it. >> to understand oklahoma city and today's violence in el paso. and all of the bloodshed that came before it. >> contact, shots fired, shots fired! >> we need to understand mcveigh's favorite book. it's called "the turner diaries." >> nationalism really is the wave of the future. >> it was written in the 1970s by william pierce. >> i did admire many things hitler wrote. >> he was a one-time physics professor who became a leading figure in the white supremacist movement. >> villainous, traitorous!