GAZA CITY  The emergency room in Shifa Hospital is often a place of gore and despair. On Thursday, it was also a lesson in the way ordinary people are squeezed between suicidal fighters and a military behemoth.

Dr. Awni al-Jaru, 37, a surgeon at the hospital, rushed in from his home here, dressed in his scrubs. But he came not to work. His head was bleeding, and his daughter’s jaw was broken.

He said Hamas militants next to his apartment building had fired mortar and rocket rounds. Israel fired back with force, and his apartment was hit. His wife, Albina, originally from Ukraine, and his 1-year-old son were killed.

“My son has been turned into pieces,” he cried. “My wife was cut in half. I had to leave her body at home.” Because Albina was a foreigner, she could have left Gaza with her children. But, Dr. Jaru lamented, she would not leave him behind.