According to
UN's website, if I'm interpreting it correctly, casualties in Gaza since 2008 have been roughly 5,300. With that in mind, I reckon when we see the casualty figure rising to the tens of thousands, then international pressure will pile on Israel and I don't think the Israeli's would want to go that far. But that's just a wild guess from me. And no, that's not acceptable if you think I'd condone something like that.
Both of you know very well though that Israel will not go as far as killing 2 million Palestinians. That would be a top 10 genocide of all time.