Some Data Points
This is instructive:
In 2002, at the height of the second intifada, more than 1,000 Palestinians were killed, compared with about 400 Israelis. In the past eight days of war, more than 460 Palestinians were killed, and four Israelis died by rocket fire.
From 2-1 to 100-1 in six years is a big gain in killing efficiency. Just so long as the Israelis never expect any actual relationship with any actual Gazans, it works after a fashion. But does it deny Hamas a psychological victory?