Re: Big rant, lots of capital letters...
I'd say: let them have their freedom and liberty!
Don't get me wrong, I think the limitations of some of our fundamental rights is not something to be taken lightly and should indeed be critically questioned. After all, there has to be some balancing of conflicting goals and e.g., a total shutdown with the whole population forcefully quarantined without exception isn't, in my opinion, an acceptable answer either (i.e. under current circumstances).
Coming back to our "libertarians". Let them rant, let them demonstrate, let them meet! Not online, but rather in real life, in person. Let them spread viruses amongst themselves. And let evolution do the rest.
I do have some doubts that this actually works, but one can at least hope... Or as an American friend of mine recently said: then there will be less Trump-voters.