Germany during WWI vs. US during War in Iraq

When we were talking about all the reasons why Germany lost WWI I made some connections to the war going on today with our own country. The biggest similarity I noticed was that the Germans lost because the public just did not support the war anymore. They wanted it to be done, enough people had died. I find this situation very similar to the one happening today. In my eyes, the war should be over and I think that a lot of U.S. citizens would agree that they are just not supportive of the war any longer. Granted we are not losing as many lives per day as the Germans did, but we are losing lives nonetheless. And for what cause? We've already caught the conspirators that planned 9/11 and why do we have to establish and make them a great government? It's not our country! We should be more focused on our own government and our economy. I definitely feel a sort of connection to the German citizens during WWI. Asking myself, why are we still doing this? Why are we in this still?