What made it even worse than before is that following the return of democratic government in 1999, the Muslim-dominated northern Nigerian states have introduced Sharia law, including punishments against blasphemy and apostasy. Several incidents have occurred whereby people have been killed for or in response to perceived insults to Islam or the prophet, and many more have only become even more radicalised believing that Nigeria should be an islamic country, shariah law should apply to all the country not just the muslim north and that infidels like Christians shiuld be converted, killed or made to leave. The implementation of shariah law has only embolden many of this groups/people , as they can even take matters into their own hands . Funny enough thevstate governments in the North often sympathise with this groups/people not just for personal reasons bit also religious and political reasons but they dont obviously say it publicly, but you can see it by their actions, reason many cases like this go unpunished.