The truth can be a slippery concept. Different points of view can result in different truths. Facts are something different. The IDF killed a certain number of civilians during the Gaza op. That is a fact. The number is proabably near one thousand killed. Since Israel is stuck with the fact that they killed all those civilians, their goal is to work on the truth of it. When confronted by difficulties, Israelis tend to present a legalistic argument. "You can't prove anything". In their minds, this may count as a winning approach, but it is quite a common miscalculation on their part. Israel has done many bad things over the years. So have the militants. The main difference between them is that the militants take responsibility for their bad bahavior while Israel always tries to weasel out of it.
Opposition leader Isaac Herzog calls on government to allow Syrian refugees into Israel (Haaretz)
from the article: What made Goldstone change his mind about the Gaza war report?