If it's a child sitting on the lap with her father, and her father is related to Hezbollah (and as such carrying a pager), this stuff could happen, I think.

All in all horrible to be honest ...

Apparently a message was sent to the pagers right before exploding. I saw in a couple videos where the victim looked down at their hip and angled it to see the screen. It makes sense as a trick to ensure the target is close by when it goes off, but a kid could just as easily pick it up off a table after hearing it buzz.

If it's the choice between an Israeli kid and a Hezbollah member's kid I think it's a pretty easy choice for Israel to make. Any parent would accept trading thousands of enemy kid's lives to save their own kids and that's a lot of what this conflict has come down to for Israelis. War is hell.