Israelis were left stunned and speechless when three hostages held by Hamas were killed by Israeli forces in the middle of an active war zone after they waved a white flag and screamed out in Hebrew to show they did not pose a threat.

For some, the incident was a shocking example of the ugliness of war, where a complex and dangerous battlefield is safe for no one. But for critics, the incident underscores what they say is the excessively violent conduct of Israel’s security apparatus against Palestinians.