I mean crimes like public funds misuse and corruption are also technically "victimless crimes". Except they are not. The victim in those cases is society as a whole.
This also applies here; the victim in this crime is Spanish society and the state as a whole.
Manifestations in favour of Spanish unity sure can cause high tempers and frissures in society, yet they are lauded by politicians, but God forbid arranging meetings for separatists, now that is surely an unthinkable crime worthy of nine freaking years in prison. From a portuguese very disappointed with its neighbour country.