Comedian Bill Maher explained Friday evening how his insults towards former President George W. Bush were less disrespectful than conservatives' behavior towards President Barack Obama.

Maher particularly highlighted Arizona Governor Jan Brewer sticking her finger in Obama's face a few weeks back as the latest example of a growing trend. The Real Time host discussed how he wouldn't insult Bush if he were near him unlike conservatives' decorum with the current executive chief.

"Something unprecedented is happening with the way conservatives are disrespecting this president," Maher said. "And I'm not talking about mere words uttered hundreds of thousands of miles away. Sean Hannity can say anything that he wants. No one looks to him as a model human being, or even a human being."

"Of course I'm very guilty and actually proud of innumerable insults to former President Bush, calling him 'a rube, a cypher, a shit kicker, a yokel on the world stage, a catastrophe that walks like a man, the cowboy from toy story, Drinky McDumbass, and President Larry The Cable Guy.' But I wouldn't call him that to his face, and that is the difference."

WATCH: Video from HBO, which was broadcast on February 17, 2012.