The Philadelphi Corridor, the southern Gaza/Egypt border was turned over to Egypt when Israel withdrew from Gaza. Egypt has been responsible for security, including destroying tunnels and terrorists from the Egyptian side. Israel is planning on retaining a wider corridor along the Egypt Gaza border for security purposes.
The Philadelphi Corridor will now be controlled by the IDF and Israel. This will translate into Hamas getting no more smuggled in weapons via tunnels that are now destroyed or on the list for IDF demolition teams destruction.
This is how you turn Hamas homo and neutered