They object to Conservatism. They object to Religion (those that insist on traditional morality). They object to anyone who has a strong set of moral beliefs and sticks by them. Bottom line, they object to anyone other than themselves, the self-appointed, "intellectual" elite, in positions of power. All the ranting and raving about racism, sexism, homophobia, etc. is all window dressing to cover the fact that they believe they are the ruling class and how dare anyone vote for anyone other than them.
Your comment goes right to the heart of it all. The author's purpose is not to analyse a military-ethical question but to undermine the war on terrorism, capitalism, and western democratic values through relativism
If you have time, please read Psychic Iron Cage for a fascinating explanation of the source doctrine for all this:
http://www.newtotalitarians.com/PsychicIronCagePartII.html