It's quite clear now that many of the dead at Kibbutz Be'eri and the music festival were directly caused by Israeli attack of the hostage situation.
These kibbutzim were dubiously located, obviously, but politically aligned away from ethnonationalism and populated with liberal israelis if not peace advocates. It doesn't surprise that the IDF would want to make sure all those who could be rescued but would be scathing about the israeli govt would be found postmortem.