That's right. And you can bet a good part of it is due to the wanton abuses and killings involving innocent civilians that US military were encouraged to commit while in Iraq and Afghanistan. And please don't take the word of someone who has never set foot in either country- there's plenty a You Tube video where you can hear it directly from the boots on the ground. Guilt can be, and always has been, a most deadly and silent killer in every war fought.
An emotion those who send us to war, never acknowledge, never feel, and are totally incapable of experiencing.