According to the sentiment of many other comments, no targets are acceptable if there's any chance of civilians getting hit as collateral damage. This essentially means no targets in Gaza are acceptable for air strikes, and the consequence of this would be sending IDF ground troops into a densely populated and well-prepared guerilla fighters' den with extremely high casualties. It seems like most of the critics can't accurately imagine themselves in Israel's position, portraying them as cartoonish villains rather than people trying to keep themselves safe.