From what I’ve read, it seems Israeli citizens fear the Hannibal Directive (originally about killing their own soldiers rather than letting them be taken hostage) is secretly being applied to civilian hostages. It was supposed to have been retired several years ago, but there are accusations from within Israel it was implemented on Oct 7th (for the portion of people killed by the IDF), and possibly for all the Israeli hostages that have been killed so far by the IDF in separate incidents.