How about spending those financial aid into infrastructure, improve water supply, improve power supply, technology and not spend it on rockets and offer peace...Taiwan had a long on going conflict with China but they're not eager to start another violent war with China...why is that? Philippines have a long on going conflict regarding some islands on dispute...they're not eager to start a war with China...why is that?It is a logistical nightmare to build shelters for 2.2M people, with Israel controlling movement of building materials in and out of Gaza.
Also none of those shelters will survive JDAMs and other western precision weapons that are specifically designed to bust through bunkers.