I agree with school. This goes beyond school shootings. ISIS has been posting viral videos showing mass murders with ISIS members (members are Americans, Australians, Europeans, etc. ranging in ages from 6 and up) posing amongst the innocent victims they murdered by firing squads. The only difference between those photos and videos and the two teen’s photo is the backdrop. There have been far too many US teenagers and adults of all races and ethnicities migrating to Turkey and Syria to join ISIS and the last thing the US needs is some irresponsible and immature children mocking this global conflict right now that is becoming more and more of a threat to Americans by posting pictures such as this on social media.
For a closer look into the world of ISIS teens and young adults and how they use social media like Twitter and Facebook to recruit and advertise see Ellie Hall’s BuzzFeed article “Inside the Chilling Online World of the Women of ISIS.”