Here's the cover, drawn by Laurent “Riss” Sourisseau:
The WaPo piece is written by Michael Cavna, "creator of the 'Comic Riffs' column and graphic-novel reviewer for The Post's Book World." There's no detail to his idea that the character on the cover represents "the idea of religion in some form as a villain." The words are translated as "One year on: The assassin still at large." So that guy is "the assassin," but the only indication of religion is the pyramid with the eye. Can we get some analysis? That's not a Muslim symbol at all as far as I can tell. It has more to do with Freemasons than anything else. And it's on the U.S. dollar bill (and the Colorado state seal and the seal of the city of Kenosha, here in Wisconsin). I'm just guessing the cartoonist meant to attack religion in general and to be very obviously not about Islam.