The U.S. has spent $1.3 trillion on the war on terror so far. That was in reaction to about 14,000 total deaths from international terrorism from 1975 to 2003. That's more than $90 million spent for each person killed.
I came across a link to this article in a posting about logical fallacies that make you more wrong than you think (http://www.cracked.com/article_19468_5-logical-fallacies-that-make-you-wrong-more-than-you-think.html) and one of the things they mentioned is that you can present some people with all the facts in the world during an argument and it will never convince them to retreat from their position if it is something they feel strongly about.
Reading some of the comments on the post linked to this seed validates the link above.
Now, I agree that a Cost-Benefit analysis isn't the best thing always and we can't necessarily put a price on human life (but of course we can compare life against life).
So some facts:
6000 American lives.
Upwards of 200,000 Afgani and Iraqi lives (alternate sources have long topped 500,000 in estimates)
1.3 trillion dollars (billions of which "disappeared")
Immense hatred by citizens of many other countries.
And I still am afraid to go walking for too long outside my house now that it's dark (living in a major city). I don't know about you but I feel less safe than I did 10 years ago.
Actual REAL threats and not imagined threats exist and are getting worse (drugs on the Mexican borders).
Oh and I honestly don't see anything accomplished yet for all of this.
Now there is talk by the Republicans of another war...
What has to happen for some of these sheep for people to not keep supporting these wasteful wars? The politicians get their pockets padded, but the rest of you get...? Some false peace of mind?