then that kind of autonomy is a fictional concept that is out of reach for any modern nation.
True autonomy and isolation IS impossible for modern countries. There isn't a single country that has access to every single resource needed for modern society, some things will always have to be imported.
A 1700s era society, however, is totally within the realm of possibility. Not much use for neodynium or lithium in the 18th century.
I'm not so sure on this one.
I'd like to think I'm willing to use the tools at my fingertips to sling hot lead in defense of minorities and prevent a total takeover, however, I recognize that doing so myself is a death sentence.
Taking a stand just makes you a target in a very wide open field. You need more people to take a stand with you to be effective. How many people feel the same as I do? Willing to stand as a group, but not solo?
Organization is important. Organize or be sent to a ~~concentration camp~~ "prison". Organize or be arrested for protesting the regime. Organize or die.
Organized resistance is much harder to take down. With enough people, you wouldn't even need to fight. But you should absolutely be prepared to.