1. Were the pagers/radios distributed to only Hezbollah members or was Hezbollah the main purchaser of the lots? Plenty of professions (doctors) still use pagers.
2. Did Hezbollah distribute these only to militants or did members of its civil service receive these as well? Keep in mind that Hezbollah is a legitimate political party in Lebanon and provides social services and operates hospitals. They have plenty of members and leaders who have never personally lifted a finger to harm Israel.
3. Did Israel verify that these devices were in the hands of Hezbollah members at the time of detonation and that those members were isolated to minimize collateral damage? The answer to this is clearly no, the logistics are simply impossible to track who is holding 3000+ passive devices. And we've seen reports of civilian causalities including a dead child.