Why no help?

During WWII, musicians and celebrities greatly supported the war, and tried to help out all that they could. They would give profits to the war, help out soldiers, write songs, and much more. It all showed their devotion to the U.S. However, nowadays, this is a bit unheard of. We do not even know if any musicians would give their time or money to the war, because now, supporting the war is not something many musicians do. Maybe, it is just the difference in the types of wars, but I know that the war in Iraq, for example had little support from musicians. I can think of many negative songs written about the war and George W. Bush, but no positive ones. Nowadays, loyalty to our country does not exactly seem like a "cool" thing to do. What has affected such a decrease in loyalty to America's wars? During WWII, patriotism was greatly appreciated and looked up upon. Now, you hardly ever see musicians trying to do what they can to help the war, because they just do not want to support it. What is it about our society now, that causes such a change in mind?