Your son, as well as every other soldier killed in this conflict, died because he made an informed and conscious decision to join the military of a nation committed to protecting its citizens during a time of terror and upheaval. To say he was duped by a recruiter with promises of cash and a guarenteed slot in the Chaplancy is to call into question and discount to the world his intelligence, his sense of duty, his honor, and his manhood. You turn him from the man he was into the child you raised. He earned his manhood and independence, and the world owes him it's respect.
Your son died because he stepped up bravely when he was needed and did what was necessary to quell rioting near Baghdad. He knew the risk and accepted it.
Your son died because thousands of foreign nationals cross the border into Iraq every day from such places as Iran, Syria, Saudi Arabia, Chechnya, Jordan, Palestinian Israel, Morrocco, Pakistan. They cross the border and take up arms, not for the freedom of a nation, but to preserve the status quo of corruption, despotism, fanatisism, and intollerance. They do so, emboldened by the words and deeds of those here who do not merely question or debate the war, but who take up verbal and written arms against this nation, her government, and her military for no other reasons than intellectual arrogance and political intollerance.
Your son is dead because France and Germany and Russia put their own greed and self interest ahead of the good of an entire people held in servitude by the avarice and ego of one man, Saddam Hussain, and his quest for ever increasing territory and power in the Middle East. Even after the US pulled away from him after the gas attacks during the Iran-Iraq war, these countries and more continued to trade with him, enhancing his military and his outlandish palaces while leaving his country in ever increasing poverty. If you want to yell "No Blood for Oil" and accurately address the involved parties, you will need to have a visa and risk imprisonment. Most of these countries are not nearly as open to dissent as what you are used to.
If you want to know why your son is dead, look in the mirror. He is dead because you raised him right, in spite of your behavior now. ...
Go read her whole post. It's magnificent. Great job, Mamamontezz.
Update: A little background on Cindy Sheehan.