Yes, I've been in the army. I've seen death, but honorable ones, where a burial is given to each and every body.
Separated from Reality
Scum of the earth? For all you know, they're traders, merchants, and workers, working a job to support their family. Whether or not they're a saint or Hitler himself, killing them is still murder.
Tears of the Fallen
Death is not a simple fate. Have you ever held a dying man in your arms? Knowing that they will never open their eyes again is a terrifying thought. Imagine if your loved ones fell to a bullet of a madman. Tears wouldn't do them justice.