The real mess would occur if the army itself divides. The socialists use violence of small groups indirectly, they are not a force in themselves, and those groups are too small to face armed citizens that will just defend themselves. In that case the army will have a pacifying role with which the majority will agree, thus avoiding a bigger scale conflict. The social atmosphere would get unbearably tense, that's for sure, but at that point mass immigration is the most probable outcome.