More like Egypt requires fertilizers in order to maintain it's domestic industry.

Cheap NatGas means cheap ammonia synthesis, which means cheap fertilizers.

Sinai has also been in the midst of a violent Islamist insurgency [0] which can be further exacerbated by the security situation in Gaza.

[0] - https://www.brookings.edu/wp-content/uploads/2017/05/de-secu...