Heavily armed gunmen on Wednesday infiltrated the offices of Charlie Hebdo, a satirical newspaper in Paris, murdering at least 12 people, including its editor, before fleeing. The deadliest terror attack on French soil in more than a decade is a fresh reminder that the war on Islamist terror is far from won, and that jihadists are bent on eradicating the heritage of Western freedom.

Charlie Hebdo was founded in 1970, and the left-wing weekly has always been an equal-opportunity offender. Its politics and taste aren’t ours, but from Jesus to Michael Jackson and from 9/11 to the Pope, nothing has been off-limits.

“Wednesday’s attack also demonstrates again that violent Islam isn’t a reaction to poverty or Western policies in the Middle East. It is an ideological challenge to Western civilization and principles, including a free press and religious pluralism.”

That mocking spirit extended to Islam, and the paper drew…