It should be removed by Facebook, whom once again is violating its own TOS:

"Most of the posts that met her threshold for inclusion involved officers’ statements about people of certain religions, races, or citizenship status, or about the appropriateness of violence in policing or addressing crime, she said. Another theme was the use of dehumanizing terms to describe suspects — words like animals, savages, or subhumans."

e.g.:

"One man identified on the database as a Philadelphia police sergeant shared a photo of a skeleton wrapped in a U.S. flag, carrying a gun, and the words Death To Islam on top."

To criticize a religion is one matter. To, if do nothing else, violate Facebook's TOS by advocating violence and specifically threatening any religious group is another:

1) "Hate speech -> Religious affiliation -> Report Comment -> I think it shouldn't be on Facebook -> This is harassment or hate speech -> This is hateful towards a religious group"

2) "Violence -> Report Comment -> I believe that this goes against Facebook's Community Standards ✔"

and despite what the Plain View Project states about this kind of post as it describes it and all of the other posts, it is not "open to various interpretations" or in any way ambiguous as to "what a poster meant when he...typed [it]".

Facebook has a duty to follow its own TOS, and they should remove any content that calls for harm against any religious group.