The guys who design these bunkers know what they're doing - some of Saddams were designed to take a direct hit from a nuke, say 250 kt or so - and I'm sure the same engineers doing the Iranian and/or Syrian underground complexes designed and built these. Now, if the German engineers gave the Israelis the plans, maybe they knew where to drop the bombs.... But seriously, 23 2,000 lb bombs only seems like a lot to a layman. Really hard targets take much more pounding.
Uh oh. Shep's on Fox News now. Reporting on this hit. Says the bunker is 100 feet deep, constructed by Iranians, had multiple exits. No idea yet whether senior Hezbollah leadership were inside.
Israel rules.
But if they came one at a time onto the same aim point, they could very well dig down 100 feet.