What is shocking is that Hezbollah does not test its own personnel's equipment for high explosives.
It's a huge blow to their military capabilities, because they can no longer trust their own equipment.
Hezbollah fights as a networked organization and that requires pretty good real-time communications. So it's a big step back in that
It's also going to damage their own trust in eachother, because it shows how deeply riddled Hezbollah is with Isreali sources and infiltration.