Like some of the other people here, I'm not going to assume 100% that this is real until more of the facts come out. That said, I wouldn't put this past people from 4chan in their crusade of nihilism and destruction.

Of course 4chan is not a monolith and there are plenty of peaceful people there (especially outside of /b/) but at some point it becomes obvious that this is a place where some very dark people meet up online to do dark stuff, sometimes out in the real world.