So is it good that some children were killed? Were there terrorists/part of the terrorist organization? Were the random people standing in line at the grocery store terrorists? Even if the Israeli government knew for a FACT that only Hezbollah members were in possession of the pagers, detonating them in public places would still be an act of terror. Even if they knew for a fact that none of the pagers were in public, this would still be a war crime.
I expect Israel to not commit acts of terror and war crimes. It would be an act of terror no matter what country did it. But sure, I guess an acceptable number of children were killed. You know, there are easier ways to tell everyone that you think genocide is chill.