The numbers you state are from the Lebanese government and Hizbollah. So I don't think we can assume they are accurate. I don't have any better numbers, though.
You specific argument though misuses even those numbers. 42 is the number of people actually killed. I couldn't figure out how many were targeted (how many pagers did explode), but I'd assume the number could be much higher than the number of deaths. Without that number we cannot determine how well targeted this was. I also don't think it is plausible that for every target you injure 100 bystanders. So I would assume the number of targets was at least an order of magnitude higher.
There's also another number from Hizbollah, that 1500 of their people were injured. But no idea it those would be included in the 4000 wounded number.
You specific argument though misuses even those numbers. 42 is the number of people actually killed. I couldn't figure out how many were targeted (how many pagers did explode), but I'd assume the number could be much higher than the number of deaths. Without that number we cannot determine how well targeted this was. I also don't think it is plausible that for every target you injure 100 bystanders. So I would assume the number of targets was at least an order of magnitude higher.
There's also another number from Hizbollah, that 1500 of their people were injured. But no idea it those would be included in the 4000 wounded number.