not entirely true , please get educated

https://tribune.com.pk/story/2302309/how-and-why-israel-helped-create-hamas

https://theintercept.com/2018/02/19/hamas-israel-palestine-conflict/

https://www.bbc.com/news/world-middle-east-20415675

below text is from the bbc article ( above)

Israeli restrictions on access to agricultural land and fishing have reduced the amount of food Gazans can produce themselves.

Areas up to 100m (330ft) from the 60km-long Israeli perimeter fence are considered to be "no-go" areas. Farmers cannot grow anything there, even if they own the land. People other than farmers are not allowed within 300m.