That's not what they claim
I'm trying to find an official statement but all I could find was secondary sources.
I'm not sure how big the Boston Globe is, but here's their official stance on the issue:
New York Times:
Ultimately, he decided against it, he said, because he had to consider foremost the sensibilities of Times readers, especially its Muslim readers. To many of them, he said, depictions of the prophet Muhammad are sacrilegious; those that are meant to mock even more so. “We have a standard that is long held and that serves us well: that there is a line between gratuitous insult and satire. Most of these are gratuitous insult.”
.