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Those who dismiss responsible journalism seek to impress with this type of pablum.
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For the rest of us, here are the reports from The Telegraph, The Times of Israel, snd the New York Times respectively:
The NYT article notes:
The fervor of the response to the killing of Mr. Haniyeh underscores what a devastating security failure this was for Iran’s leadership, with the assassination occurring at a heavily guarded compound in the country’s capital within hours of the swearing-in ceremony of the country’s new president.
“The perception that Iran can neither protect its homeland nor its key allies could be fatal for the Iranian regime, because it basically signals to its foes that if they can’t topple the Islamic Republic, they can decapitate it,” said Ali Vaez, the Iran director for the International Crisis Group.
It then summarizes:
The intensity and scope of the Guards’ investigation reveal the degree to which the assassination has shocked and rattled the country’s leadership.
The deadly blast, which also killed Mr. Haniyeh’s Palestinian bodyguard, wasn’t only an earth-shattering collapse of intelligence and security; nor only a failure to protect a key ally; nor evidence of the inability to curb the infiltration of Mossad; nor a humiliating reputational blow. It was all of those, and more.
Perhaps most important, it delivered a jarring realization that if Israel could target such an important guest, on a day when the capital was under heightened security, and carry out the attack at a highly secure compound equipped with bulletproof windows, air defense and radar, then no one was really safe.