Watch Benjamin Netanyahu Tell U.N. Members the Gripping Story of How His Grandfather Was Brutally Beaten by an Anti-Semitic Mob

Israeli Prime Minister Benjamin Netanyahu addressed the United Nations on Tuesday and made a bold and detailed case for why the United States should not trust Iran’s recent “charm offensive.” Not only did he call new Iranian President Hassan Rouhania “wolf in sheep’s clothing,” he even used a personal story of how his grandfather was once brutally beaten by an anti-Semitic mob to make his larger point of the resilience of the Israeli people.

Netanyahu also declared that Israel will never allow Iran to get nuclear weapons, even if it has to act alone,  adding that Israel’s future is threatened by a “nuclear-armed” Iran seeking its destruction.

You can watch him tell the emotional story of his grandfather below:

“Ahmadinejad was a wolf in wolf’s clothing. Rouhani is a wolf in sheep’s clothing,” Netanyahu said during the speech.

He urged the international community to keep up biting sanctions against Iran, saying the greater the pressure, the greater the chance for diplomacy to succeed.

NEW YORK, NY – OCTOBER 01: Israeli Prime Minister Benjamin Netanyahu speaks at the 68th United Nations General Assembly on October 1, 2013 in New York City. Over 120 prime ministers, presidents and monarchs are gathering for the annual meeting at the temporary General Assembly Hall at the U.N. headquarters while the General Assembly Building is closed for renovations. Credit: Getty Images

The prime minister stressed that all Iranian presidents serve the same “unforgiving regime” where the supreme leader, Ayatollah Ali Khamenei, is a dictator and the real power.

He also accused Iran of lamenting the human tragedy in Syria, but at the same time directly participating in “Syria’s murder and massacre of innocents.” He said Iran’s regime is propping up the Syrian regime that just used chemical weapons against its own people.

This story has been updated.