They also have one of the most sophisticated communications technology. They had spies everywhere. 2,900 people attacked and they didn't have one spy to tell them a date...

According to The New York Times, Israeli officials had obtained detailed attack plans more than a year before the attack. The document described operational plans and targets, including the size and location of Israeli forces, and raised questions in Israel about how Hamas learned these details.

The Times reported, "Hamas followed the blueprint with shocking precision."

In July 2023, a member of the Israeli signals intelligence unit alerted her superiors that Hamas was conducting preparations for the assault, saying, "I utterly refute that the scenario is imaginary". An Israeli colonel ignored her concerns.

Source: Wikipedia

They allowed this to happen. They wanted a reason to attack and take what's left of Palestine.