That's where the militants' missiles were heading, right toward Israeli civilian centers, when they were shot down. The IDF on the other hand could have killed thousands if they wanted to with indiscriminate bombing of Gaza but it is a great testament to the IDF's careful military modus operandi that the civilian casualties were so low. In fact there would have been no Gazan civilian casualties at all if your "brave" militants there came out to fight like men away from their civilian cover instead of hiding away in reinforced tunnels with their fingers plugging their ears after they posted "No Civilians Allowed!" signs outside their tunnel entrances and left their civilians to face Israeli retaliatory actions.
4.2-scale earthquake felt in Dead Sea, Jerusalem area (Haaretz)