The idea behind most terrorism is that a weaker opponent provokes a larger, more powerful one into making a political/strategic mistake.
For example, 9/11 wasn’t about knocking down some towers, it was about getting the US entangled in a foreign war with boots on the ground.
For this attack, when Israel invades gaza with armour and soldiers, a LOT of people on both sides will die. Every dead gazan will be a martyr, every dead Israeli solider is, well a dead Israeli. Maybe that retribution becomes too much for the international community, maybe the scenes that will inevitably come from gaza will ignite the Arab world etc.