What's a "proportionate response" to a pogrom?

Israel's attacks against Gaza have been devastating and will likely get much worse. But what should it do instead?

As last weekend’s massacre in Israel fades from memory, leaving some mop-up work about whether images of murdered Jewish babies were computer-generated, the news cycle has shifted to Israel’s military response in Gaza.

You know which side I’m on in this conflict. And yet, this kind of thing really worries me:

Israel’s military directed the evacuation on Friday of all of the hundreds of thousands of civilians living in Gaza City ahead of a feared Israel ground offensive. The directive came on the heels of what the United Nations said was a warning they received from Israel to evacuate 1.1 million people living in the north of Gaza within 24 hours.

The Israeli military pulverized the Hamas-ruled Gaza Strip with airstrikes and blocked deliveries of food, water, fuel and electricity ahead of a possible ground invasion as Palestinians tried to stock up on supplies.

International aid groups warned of a worsening humanitarian crisis after Israel prevented entry of supplies from Egypt to Gaza’s …