David Horowitz has been promoting his new book Radicals: Portraits of a Destructive Passion on conservative talk radio by attacking Hillary Clinton’s aide Huma Abedin as a Muslim Brotherhood agent and arguing that President Obama was only elected because he is black because “part of the racism of our society is [that] if you’re black you can get away with murder.” Horowitz’s interview with Janet Mefferd was no different, as he charged that Abedin “is a Muslim Brotherhood operative and she has been all her life” and that she has been pushing foreign policy favorable to the Muslim Brotherhood. Horowitz even said that Abedin “is worse than Alger Hiss,” the accused Soviet spy.

But it is not just the Obama administration which has been penetrated by the Muslim Brotherhood, as Horowitz warned that “the Republican Party has also been infiltrated” thanks to conservative luminary Grover Norquist, whom he said is a “practicing Muslim.” Norquist is a reviled figure among anti-Muslim activists like Horowitz, who in 2011 lashed out at Norquist from the podium at CPAC, mainly due to the fact his wife is a Muslim-American and he works with Muslim Republicans like Suhail Kahn.

Horowitz: We have a medieval enemy with twenty-first century technology aimed at us, they’ve infiltrated our government. If you wondered how it’s possible that Obama and Hillary would not know or would pretend what was happening wasn’t happening in the Middle East or how they could turnover Egypt as they have to the Muslim Brotherhood, which is the fountainhead of Al Qaeda and all of these terrible Islamic Nazi organizations, the answer is not really hard to find: the chief adviser to the American government on Muslim affairs, Hillary Clinton’s deputy chief of staff, Huma Abedin, is a Muslim Brotherhood operative and she has been all her life, and her whole family is. This is worse than Alger Hiss, for those in your audience who are old enough to remember, Alger Hiss is a Soviet agent who was right next to Roosevelt at Yalta. Mefferd: It’s very true and yet you had these five congressmen, Michele Bachmann and the others, who tried to say the inspectors-general need to look into this, and even Republicans stood up on the floor and said no! Horowitz: You had Boehner and McCain, and McCain is just bonkers. But the Republican Party has also been infiltrated. Grover Norquist is a Muslim, he is a practicing Muslim.

Later, Horowitz explained that liberals and radical Islamists are working out of their shared “hatred for America” and promoted the ridiculous and debunked conspiracy that Bill Ayers wrote Obama’s book Dreams from My Father.