Bill Donohue knows who is responsible for the massacre at Charlie Hebdo — the cartoonists themselves.

The outspoken Catholic League president put a post on his group’s website called “Muslims are Right to be Angry,” in which he blasted the French paper for “the vulgar manner in which Mohammed has been portrayed.”

Donohue said he abhors the violence, but blasted Stephane Charbonnier, the slain editor of the paper, where 12 people were shot dead by terrorists Wednesday.

“It is too bad that he didn’t understand the role he played in his tragic death . . . Had he not been so narcissistic, he may still be alive,” Donohue said.

The New York-based Catholic activist — whose group is not part of the official church — also complained that Charlie Hebdo mocked Catholics.

“[The paper has] a long and disgusting rec­ord of going way beyond the mere lampooning of public figures and this is especially true of their depictions of religious figures,” he said. “For example, they have shown nuns masturbating and popes wearing condoms.”