Maher: 'Who the f--k is Saul Alinsky?'

At the end of his "New Rules" segment Friday evening, Bill Maher was desperate to find out who exactly was the "radical activist" Republicans love to compare to President Barack Obama.

The Real Time host requested that Republicans answer two questions when lumping civil rights advocate Saul Alinsky to the current executive chief.

"Why would you invite my outrage by suggesting such a specious link between our president and Saul Alinsky?" he asked. "And two, who the fuck is Saul Alinsky?"

Eager to find out truly who Alinsky was, Maher summed up why the likes of Newt Gingrich loved to make the comparison.

"I wikipedia'ed the guy," he said. "Instantly, I discovered the problem: he liked black people. Way back in the 30s, he started organizing the civil rights movement. And as a historian like Newt Gingrich would tell you, the civil rights movement turned out to be a huge burden on white people."

WATCH: Video from HBO, which was broadcast on January 27, 2012.