Pulitzer Prize-winning Doonesbury cartoonist Garry Trudeau has taken a bitter swipe at Charlie Hebdo, saying the Parisian magazine’s anti-Muslim cartoons “wandered into the realm of hate speech.”

“Free speech . . . becomes its own kind of fanaticism,” Trudeau said, condemning his French colleagues Friday after he accepted a lifetime achievement prize during the George Polk Awards in Journalism at Long Island University.

Twelve died when gunmen attacked the Charlie Hebdo offices in January in retaliation for offensive ­Mohammed cartoons.

A dozen more deaths resulted in the following weeks during violent protests in Niger, Pakistan and Algiers.

“By attacking a powerless, disenfranchised minority with crude, vulgar drawings closer to graffiti than cartoons, Charlie wandered into the realm of hate speech,” Trudeau said.