Atheists and Libertarians are both on the side of the mainstream of public discourse; that is, on the side of the Global Establishment, the mass media, and the interlinked bureaucracy - with their agenda of a single, totalitarian System of value-inversion.
Taken seriously, atheist assumptions would lead to paralysing despair - perhaps as the terminus of a brief phase of psychopathic hedonism.
But atheism never is taken seriously in public discourse; because all atheists are hypocrites - at root, because that there is no such thing as the sin of hypocrisy from an atheist perspective. In sum, there are no sincere atheists.
(Any atheist that did take atheism seriously would not participate in public discourse, would - indeed - keep his atheism secret; and would soon be dead. So we would never know about him.)
This is the same as libertarianism: there are no sincere libertarians. All libertarians are either hypocritical and self-contradicting; or else (usually, nearly always) they sell-out, as soon as it is expedient for them to do so. Why not?
(Libertarianism is just a career strategy - a bit like forming a start-up company in hope that you will become successful enough to be bought-out by one of the industry giants.)
I think these facts are widely known - but come up against the question If Not, Then What? It seems that most modern people have pre-decided the answer must be 'Anything but Christianity' then they have painted themselves into a corner.
Until they recognise that Christianity is the answer, and set about finding out just how it is the answer; they are stuck in a hopeless trap, forever.
Note: I have been both an atheist - most of my life; and a libertarian - late 90s to mid-2000s.