Did you miss the "can range from 3-15 times higher than the direct casualty count" part?
Also, the Nazis were in charge for 12 years. This mass killing started only three years ago, but Israel will catch up.
Remember, Israel is blockading food, fuel, and medicine while still bombing and shooting people. This winter is probably going to be extremely bad and see the death toll spike: Israel targeted Gaza's water infrastructure, hospitals, and has destroyed 82 percent of all structures. No construction equipment or material is allowed in, so most people are effectively homeless.
The plan is total elimination of Gaza as a polity, either by displacing or exterminating the population. There's nowhere to displace them to (the Nazis ran into the same problem) so if Israel is not stopped then we will see them exterminate everyone.
And Israelis love it. The main electoral split is between people who support Netanyahu's current plans for genocide, and people who want even more genocide and think Netanyahu has been too soft on the Palestinians.