Israel Knew Hamas’s Attack Plan More Than a Year Ago

The approximately 40-page document, which the Israeli authorities code-named “Jericho Wall,” outlined, point by point, exactly the kind of devastating invasion that led to the deaths of about 1,200 people.

Then, in July, just three months before the attacks, a veteran analyst with Unit 8200, Israel’s signals intelligence agency, warned that Hamas had conducted an intense, daylong training exercise that appeared similar to what was outlined in the blueprint.

But a colonel in the Gaza division brushed off her concerns, according to encrypted emails viewed by The Times.

“I utterly refute that the scenario is imaginary,” the analyst wrote in the email exchanges. The Hamas training exercise, she said, fully matched “the content of Jericho Wall.”

“It is a plan designed to start a war,” she added. “It’s not just a raid on a village.”

Underpinning all these failures was a single, fatally inaccurate belief that Hamas lacked the capability to attack and would not dare to do so. That belief was so ingrained in the Israeli government, officials said, that they disregarded growing evidence to the contrary.