So you think they managed to destroy so many buildings and only killed ~65k people (about half militants) out of 2 million by not avoiding civilian deaths? If half the buildings are destroyed, we would expect a million dead if there were no efforts to avoid civilian deaths.
Do you think Israel makes no efforts to avoid civilian deaths? If you were presented with easily verifiable proof that they do avoid it (via both their own reporting, international reporting, and Palestinians themselves), would you retract your statement? Are there any facts which would change your mind? I ask because these facts are easily accessible, and I'm happy to provide them with many sources, but only if providing them isn't a total waste of time because it's become a pseudo-religious belief.
You should look up civilian death rate in previous wars, even recent ones. Civilian deaths typically outnumber combatant deaths by a factor of at least 2:1, often more like 6:1, and sometimes more.