▁including ▁a ▁third ▁of ▁its ▁agricult ural ▁lands ", ▁according ▁to ▁H R W . ▁According ▁to ▁the ▁Israel ▁Def ense ▁Force ▁( ID F ), ▁this ▁is ▁done ▁" to ▁prevent ▁the ▁conce al ment ▁of ▁impro vised ▁explos ives ▁and ▁to ▁dis rupt ▁and ▁prevent ▁the ▁use ▁of ▁the ▁area ▁for ▁destruct ive ▁purposes ." ▁ ▁The ▁border ▁f ence ▁between ▁Gaz a ▁and ▁Israel ▁( the ▁separation ▁bar rier ) ▁is ▁composed ▁of ▁a ▁cru de ▁bar bed - wire ▁bar rier , ▁a ▁brief ▁gap , ▁and ▁then ▁a ▁ ▁high ▁" sm art ▁f ence " ▁with ▁sens ors ▁to ▁detect ▁in fil tr ators . ▁A ▁crowd ▁sur ging ▁towards ▁the ▁f ence ▁could ▁cross ▁the ▁f ence ▁in ▁some ▁ 3 0 ▁seconds , ▁according ▁to ▁one ▁of ▁the ▁contract ors ▁who ▁built ▁it . ▁ ▁Protest ▁organization ▁The ▁principal ▁demand ▁of ▁the ▁protest s ▁was ▁the ▁right ▁of ▁return ▁for ▁Palest in ian ▁refuge es ▁and ▁their ▁descend ants ▁to ▁present - day ▁Israel . ▁A ▁majority ▁of ▁Gaz a ' s ▁population ▁consists ▁of ▁refuge es ▁from ▁the ▁ 1 9 4 8 ▁Palest ine ▁War ▁and ▁their ▁descend ants . ▁Israel ▁rejected ▁any ▁right ▁of ▁return , ▁fear ing ▁that ▁Jews ▁would ▁become ▁a ▁minor ity ▁in ▁Israel ▁if ▁too ▁many ▁Palest ini ans ▁returned . ▁ ▁In ▁ 2 0 1 1 , ▁Ah med ▁Ab u ▁Rat ima ▁( or ▁R te ima ), ▁whose ▁family ▁originally ▁came ▁from ▁Ram le