Who were these people?...

Per Powerline, this is a picture of an Israeli woman (8 months pregnant) and her four daughters. They were killed in a Gaza terror attack. Per Israel Insider:

An Israeli woman in her eighth month of pregnancy and her four daughters were killed this afternoon when two terrorists opened fire at Israeli cars traveling on the Kissufim-Gush Katif road in the Gaza Strip. The attack occurred when the two gunmen, apparently residents of Dir el-Balah, began firing at Israeli cars on the road. Police said the mother was shot, causing the Hatuel's white Citroen to swerve off the road. The attackers approached the vehicle and shot the mother and her children with "killing shots" at close range.

As point of comparison to the reaction of the Arab Press regarding the mistreatment of POWs in Iraq, Powerline states,

The most popular Palestinian organization, Hamas, claimed credit for the attack, but two other organizations, Islamic Jihad and the Fatah's Popular Resistance Committees, also tried to get credit for the murders. The photo... shows Tali Hatuel, and her four daughters, Hila (11), Hadar (9), Roni (7) and Merav (2). When photos of these victims are as widely disseminated in the Arab press as those of the still-alive-and-well Iraqi captives, and when their murders are denounced with equal fervor, I will be more impressed by "outrage" in the Arab press.