You can never take any statistics coming from the Arabs seriously. It is part of Islam to lie to the Infidel. This is not bias. It is a true provable fact.
Also, during the so called Intifada I was in Israel at this time. Hamas was famous for shooting their own people. Whether it was friendly fire or deliberate, is unknown. Also, they drag their dead to the international press for photo ops of dead people, even though it was unknown who or what actually killed them. Remember, their medical care is primitive and barbaric. So even a minor injury can result in death.
Arabs are proud liars and they have no boundaries, no honor at all, as to what they will stoop to for photo op pictures in international papers. They would even empty out morgues for bodies, especially children, and pile them together, usually with dolls and toys strewn about, somewhere close to a reporter.
Very much like the Nazis, any Blood Libel they could manufacture against Jews (not just Israelis, but all Jews) they had no limit or compunctions to do anything. They were blowing up empty buildings and then seeding them with bodies that they got from who knows where? Maybe they were gay, and Hamas threw them off a building. Maybe they too peacenik for Hamas and were expendable. Maybe they were prisoners. Who knows? It could be anything.
These numbers coming from Hamas are useless. They have no shred of credibility.