“Johnny I hardly knew ye”: As appropriate as ever

As the United States gets ready to choose between two presidential candidates who support the vision of the world as a perpetual battlefield, the song “Johnny I hardly knew ye” is as appropriate as ever. Joan Baez sang this song in the 60s in the context of the Vietnam War. Why isn’t the U.S. public as concerned and outraged by the ongoing wars (in Afghanistan it’s going on 15 years!) as we were in the 60s:
https://www.youtube.com/watch?v=RTYBtj0gFcY