On HBO’s “Real Time” on Friday night, host Bill Maher entertained CSU-San Bernardino professor Brian Levin, director of the Center for Study of Hate and Extremism, who maintained that despite the events in recent days, religious extremism isn’t only a product of Islam.

But Maher took issue with that claim, calling it “liberal bullshit” and said there was no comparison.

“You know what, yeah, yeah,” Maher said. “You know what — that’s liberal bullshit right there … they’re not as dangerous. I mean there’s only one faith, for example, that kills you or wants to kill you if you draw a bad cartoon of the prophet. There’s only one faith that kills you or wants to kill you if you renounce the faith. An ex-Muslim is a very dangerous thing. Talk to Salman Rushdie after the show about Christian versus Islam. So you know, I’m just saying let’s keep it real.”

Levin referenced outspoken Islam critic Pamela Geller as an example to refute Maher’s claim. But, Maher argued there was no comparison and denied he was Islamophobic.

“I am not an Islamophobe,” Maher replied. “I am a truth lover. All religious are not alike. As many people have pointed out — ‘The Book of Mormon,’ did you see the show? … OK, can you imagine if they did ‘The Book of Islam?’ Could they do that? There’s only one religion that threatens violence and carries it out for things like that. Could they do “The Book of Islam” on Broadway?”

Levin said “possibly so,” to which Maher seem dismiss his entire argument going forward.

“You’re wrong about that and you’re wrong about your facts,” Maher said. “Now, obviously, most Muslim people are not terrorists. But ask most Muslim people in the world, if you insult the prophet, do you have what’s coming to you? It’s more than just a fringe element.”