I would broadly agree that when fighting a war one must use bloody methods, even against your allies (Winston Churchill had the French fleet in North Africa sunk rather than let it fall into the hands of the Axis powers).
But that is not what some of the people posting here are advocating. We are not fighting a war in military terms against a clearly defined enemy. The ‘War on Terror’ is a battle of hearts & minds and cannot be won by military might alone. The Islamic world has as much of a hard time with the reality of the 21st century as a lot of people in the United States do (Creationism / Creative Design vs. science, anyone?), and it mystifies rational thinking conservatives like me, how no-one on this board seems to notice that.
What is particularly pernicious and clear from many of the posts here it that what some people are advocating is the wholesale destruction of nations because of their religion. In short, they are proposing a racial war of extermination and that cannot be allowed to stand as a proposition.