What a stark reminder from history that intimidation was used to enslave a country. The citizens lived in fear that they wold have uninvited thugs in their homes threatening them with violence if they did not cooperate.
Neighbor turned on neighbor and children spied on their parents. Make no mistake this could happen to any Nation if the wrong people are in power. The citizens must be alert and proactive to defeat any actions that would constitute dictatorial policies by their own government.
Check out this video and even though it's from a movie you'll see a depiction of the SS tactics .