But why didn't Israel want to move onto the next phase? It was because they wanted Hamas to extend phase 1 to release more hostages.
On 1 March, the day the first phase of the ceasefire was scheduled to end, Hamas rejected an Israeli proposal to extend it to release more hostages.
Hamas said the second phase should proceed as originally planned.
Netanyahu's office said that Israel endorsed a US plan to extend the Gaza truce for the Ramadan and Passover periods. Under this plan, half of the living and dead hostages would be released on the first day of the extended truce and the remaining hostages would be released at the end of the period if a permanent truce was reached.
His office said that the initial deal allowed Israel to resume war at any moment after 1 March if negotiations were deemed ineffective.
Imagine how much suffering would have been avoided if Hamas had agreed to the proposal to extend the truce and if a permanent truce could have been reached at that point in exchange for all the hostages.
https://en.wikipedia.org/wiki/2025_Gaza_war_ceasefire#:~:text=On%2018%20March%202025%2C%20Israel,to%20extend%20the%20cease%2Dfire.