Unfortunately, there are times when the willingness to die for your country or your beliefs will yield operational benefits when attempting to carry out an objective that's high risk. Observe the terrorist tactics that's killing so many people over the pond. Although not directly tied to U.S. military casualities, the civilian (Iraqi) casualties directly affects our military presence over there. The insurgents are willing to die for their cause. And no, because they're dying for their cause isn't necessarily going to mean they will suffer more casualties. (9/11 for example)
I'm not special forces but working around them here at HQ CENTCOM, I see the attitude that gets the job done and rarely recognized.
As a servicemember, you really don't have the choice of choosing when it's convienient or aligned to your values and beliefs because when you take the oath, the oath states that you will uphold the Constitution. If for some reason, I don't believe that leadership of the United States, I should take off the uniform. As long as I wear it, I believe that dying for my country isn't an option as most people have.
Fortunately, I will retire from active duty after 20 years in a couple months and this will not be factor for me. However, if they call me back due to a war with Iran, for example and I am willing to take that oath again, I will be of the same mindset.