Either he was fooled by the lie, or he decided that in the moment, he was served by the lie...
OBAMA FALLS FOR IRANIAN 'FATWA' HOAX ON NUCLEAR WEAPONSLast week, President Barack Obama assured the United Nations General Assembly that Iran did not actually seek nuclear weapons. However, the basis for Obama's defense of Iranian intentions is an elaborate hoax.
Obama said that a "fatwa," or religious ruling, by Ayatollah Ali Khamenei (to whom Obama referred by the official honorific, "Supreme Leader"), banned nuclear weapons and provided a basis for future peace...
<snip>
...However, as the Middle East Media Research Institute (MEMRI) reports, that fatwa "was never issued by Supreme Leader Khamenei and does not exist; neither the Iranian regime nor anybody else can present it."