The most efficient way to install (or re-install) a totalitarian dictatorial regime which rules by violence and terror, is by presenting it as a remedy to violence and terror.
Of course, the “protective” terror and violence employed by the state against the population is considerably greater than the terror and violence which the state claims to be remedying. This requires that the threat of non-state terror must be drastically exaggerated, thereby making state terror appear proportionate, while it is, in fact, brutally repressive