Exactly. ALL of those countries' politicians are well aware of the damage low birth rates will cause long term. They know that its people have to have families large enough to sustain their population, which is why they try to encourage its people to have children, but they think that men are choosing not to have children, but in reality, that's how women have become.
100% yes. Most Conservative media personalities (that includes religious figures like priests/pastors) will agree that the 1960s were the worst decade in the West's history. That's how the base for SJW politics and far left agenda (in the West) was built, with sexual liberation being the forefront of it. The 60s also saw families accepting women being career oriented instead of family oriented, so they also entered high paying jobs, reducing the average wage by half. Communists/Socialists always get this wrong, because wages aren't determined by the importance of work, or the difficulty of it, but rather the demand for it and its value. And its value gets cut by half when the working population instantly doubles.
The 70s also followed up mimicking the 60s, but this time, it really was (nearly) entirely boomers involved. They were the first to create the sexual liberation movement and identity politics. The reason why this has continued is because every generation after just follows what their parents/grandparents teach them. The boomers, even the liberal ones, had many children, mainly because anti-contraceptive pills were still in their infancy and not very effective. But now that they are, liberal millenials and GenZers will either have 0 children or 1 (at most). Which means that a conservative GenZer who has just 2 children (which technically still isn't a lot. Just enough to replace them), will now have a reproductive advantage of 200% or basically infinite%. Compared to boomers, where liberal ones would have, say 2-3 children, with the conservatives having 2-4 children, that's a massive discrepancy, that will lead to a relatively quick demographic replacement EVEN if academic insitutions that are leftist manage to brainwash them, which won't happen because parents influence you more than your professors (demonstrated by multiple studies and basically self evident), and in order to properly propagate their ideology, thay would have to be insanely effective to counteract a 200%++ reproductive advantage in the Conservatives' side, which is literally impossible.
*Also a correction.
**P.S. I can also explain if you want, how this time, social liberalism will be gone permanately, instead of society basically doing another circle.