Do no harm. The doctors must have realized that treating a few ISIS members would mean enabling far greater bloodshed.
The Red Army did the same thing during the Russian Civil War.
Hold it. Do no hatm is an admonition to dr. te patient only. Drs. have duty to treat everyone in need doing no harm to them even by neglect. Everyone. Then as a soldier they can pick up a gun and kill them in legitimate act of defense of self or others.
Dr. Emanual is the type of doctor who would do what you suggest. A social engineer rather than a healer
Since when is infecting ISIS members with hideous diseases, under the guise of treating them, harm?