An audio statement released by the Islamic State on Monday ruthlessly mocked President Obama and Secretary of State John Kerry for their claim that the terror group is not Islamic, asking when the two became such experts in Islamic law.

The recording by Islamic State spokesman Abu Mohammed al-Adnani, released online in Arabic, comes to eleven pages of bluster, threats and exhortations to violence once translated into English. It urges attacks on Western civilians – especially those from countries involved in a growing military coalition against the Islamic State — and promises the Western intervention in Iraq will be “the last crusader campaign” in the region. “Thereafter, we will raid them by Allah’s permission and they will not raid us,” it promises.

The Islamic State spokesman singled out American leadership for savage criticism, repeatedly calling President Obama ”the mule of the Jews.”

“Have you not realized, O mule of the Jews, that the battle cannot be decided from the air at all?” he asks. “Or do you think that you are smarter than Bush, you obeyed fool, when he brought the armies of the cross and placed them under the fire of the mujahideen on the ground? No, you are more foolish than him.”

Nor is Kerry spared from the Islamic State’s tongue-lashing, with al-Adnani twice referring to the secretary of state as an “uncircumcized old geezer.”

The spokesman also mocked Obama and Kerry’s claims about the group’s relationship to the Islamic faith.

“To the extent that Kerry, that uncircumsized old geezer, suddenly became an Islamic jurist, issuing a verdict to the people that the Islamic State was distorting Islam, that what it was doing was against Islamic teachings, and that the Islamic State was an enemy of Islam,” al-Adnani sneered, ”and to the extent that Obama, the mule of the Jews, suddenly became a sheikh, mufti, and an Islamic preacher, warning the people and preaching in defense of Islam, claiming that the Islamic State has nothing to do with Islam.”