Speaking on AM970 Thursday morning, Giuliani said that the president isn't paying attention to "enormous amounts of crime" and that it's the obligation of the president to explain "that our police are the best in the world."
"I hate to mention it because of what happened afterwards, but [Obama should be saying] the kinds of stuff Bill Cosby used to say," Giuliani said on the radio station, according to The New York Daily News.
Obama, actually, praises police often, including in a major speech he delivered in Selma, Alabama recently.
Cosby had frequently argued that African Americans should avoid engaging in crime and focus on being better parents.
Giuliani did offer a little praise for the president, though, saying, "I disagree with Barack Obama on almost everything, but I think he's a good family man and a good man."
About a month earlier, Giuliani said that he didn't think Obama loved America.
"He doesn't love you. And he doesn't love me," Giuliani said to a group of business executives in New York. "He wasn't brought up the way you were brought up and I was brought up through love of this country."
Giuliani later said those comments couldn't possibly be racist because Obama's mother was white.