If Gaza is attacked Hezbollah say they will join in. Israel has to keep half of its army on the northern border because they donโt want Galilee leveled
Hezbollah is not going to join i guarantee you that. i think Hamas knows israel will bomb gaza. but israel i don't think can enter gaza by foot. Hamas just destroyed Israeli merkava main battle tank.
Hamas looks like has good anti tank weapons. i wouldn't be suprised if they have good anti air specially helicopter.
plus hamas will overwhelm israeli iron dome by launches cheap missiles and israel will need to counter it with expense anti air missile defense.
which is why the key to the battle is hamas needs to sustain 5000 missiles per day for months and israel will sue for peace.