Slander ... but I would write up general incitement also directly after a tragedy. If you're going to feature organizations or groups of people, and make a work of fiction about a very real event look like non-fiction, make it obvious. Otherwise it makes slander somewhat difficult to prove, and it would help stop people using any tragic event as a means to mobilise people against another group of people.
Not only that, but you don't want people using any tragic event as a springboard to mobilize public anger into public violence.
Not only that, but you don't want people using any tragic event as a springboard to mobilize public anger into public violence.