For a lot of Americans and non-New Yorkers, the number “212” holds no special significance. Neither does the number “51.” But for comic book artist Ardian Syaf, who slipped the numbers into Marvel’s newest X-Men comic book, they represent an anti-Semitic, anti-Christian message.

It’s particularly inflammatory and disappointing that it was smuggled into the X-Men, a team that’s represented inclusivity, empathy, and tolerance.

Syaf is Indonesian artist, and in Indonesia, “212” denotes a mass protest against Jakarta’s Christian Gov. Basuki Tjahaja Purnama. Meanwhile, as the comics news websites Bleeding Cool and ComicBook.com explain, the number 51 refers to verse in the Quran (Chapter Surah 5, verse 51) that’s been interpreted by those protesting Gov. Purnama in Indonesia to: “Muslims should not appoint the Jews and Christians as their leader.”

In the premiere issue of X-Men: Gold which came out last week, there are a few instances where Syaf surreptitiously inserted the numbers into the comic. You can see an example in the panel below, which features Kitty Pryde, the Jewish-American leader of the X-Men, talking to civilians, and “212” appears on the awning of a building in the background of the scene:

Syaf/Marvel

Also notice the placement of the “jewelry” store near Pryde’s back:

There’s also this panel, which features Colossus wearing a T-shirt that refers to the Quran verse:

Syaf/Marvel

Creating comic books is a collaborative process, one that involves a back and forth between writer, artist, editors, colorist, and letterer. But it’s completely feasible, especially since the numbers probably seem pretty random to people who don’t have a background in Indonesian religious politics, for Syaf to have slipped something by his or her writers and editors.