I was wrong. Let me fix that. (Edit: I cannot edit it now.) I misread that statistic and I was incorrect. That said, 70,000 tonnes is 70 kilotonnes, not 0.7. You are correct, 70 kilotonnes is smaller than 3,000.

70 kilotonnes is roughly twice the tonnage of the nukes dropped on Japan, or roughly equal to the tonnage dropped by Germany on the UK (including during the Blitz and V2 rocket payloads).

Yea, makes sense doesn't it? Israel is fighting an almost completely subterranean enemy. Comparing tonnage to a war where the enemy was above ground is silly.