What does Hamas do with cumin, cardamom and sage? How does it threaten Israel?

According to reporter Jeremy Scahill, the following is a list of what the Israeli authorities treat as contraband and will not be allowed into Gaza:

sage
cardamom
cumin
coriander
ginger
jam
halvah
vinegar
nutmeg
chocolate
fruit preserves
seeds and nuts
biscuits and sweets
potato chips
gas for soft drinks
dried fruit
fresh meat
plaster
tar
wood for construction
cement
iron
glucose
industrial salt
plastic/glass/metal containers
industrial margarine
tarpaulin sheets for huts
fabric (for clothing)
flavor and smell enhancers
fishing rods
various fishing nets
buoys
ropes for fishing
nylon nets for greenhouses
hatcheries and spare parts for hatcheries
spare parts for tractors
dairies for cowsheds
irrigation pipe systems
ropes to tie greenhouses
planters for saplings
heaters for chicken farms
musical instruments
size A4 paper
writing implements
notebooks
newspapers
toys
razors

sewing machines and spare parts

heaters
horses
donkeys
goats
cattle
chicks