Today's class discussion

Today in class, we had a discussion in regards to our troops being in war for, according to some people, no excused reason and I feel that I disagree with some of the things that were being pointed at and want to get them out of my chest. Feel free to put your personal input if you have something to say. Am sure everyone has an opinion on this.
First of all, I don't feel that we are there just to "kill" people. I think, we at times get so blinded with all the confusing media that rather goes to get their information with some people other than those ordinary people that have actually had interacted with the soldiers; and, forget our original purpose for going after this war. I am no way in favor of George Bush's decisions, but now that we (our troops, that is) are there, we might as well do what we need to do. In addition to that, I think that by being there, Americans are also setting an example of freedom to those Iraqi people that have been exposed to a very cruel treatment due to the regime in which they lived. Believe me, we are not worse than what they have experienced in their lifetime, our country is making them free.
Having said that, maybe instead of saying something so unacceptable as being there to "kill" people, we should at a minimum try to understand the other reasons why we are still there, realize that most of the countries we have fought against are either prosperous or just better (take Kuwait for instance) and that if wasn't because of our soldiers you wouldn't even have the freedom of speech you currently enjoy of. Also, if some countries such as Belgium have so much appreciation for our military (check d-day history, Bastogne historical center,)why do we disrespect our military or our country by calling it "world police" and even dare asking why aren't we looking after some other country. Our country is the country with the highest defense budget and does its best to help out the world yes, at our expense; however, if it is criticized already as it is, imagine if our troops were in every single country's business!