There’s multiple different things going on which lead to this.
It’s always been true that people have the right to raise their children according to their own values (well, to a point anyway, no society is infinitely tolerant), but no one is guaranteed the privilege to raise children free of counterexamples to their values. Some people have always been told, “tough luck there buddy”, and that’s the non-asshole version (often it was more like “take this as a sign you should abandon your obviously inferior values”). After decades of relative privilege on this matter, the far-right and mid-right are increasing being told “tough luck”, and they really don’t like it.
Then there’s the matter of consent. Not just sexual consent, though sex is very often used as a gateway to a more general understanding of the concept. There are a lot of people who don’t understand it and don’t want to. The idea, for them, is that you should always just say no (except for the few areas where you should always just say yes) regardless of your desires or the circumstances, but your social superiors can simply override your no/yes. Unless you’re at the top of the heap, you decide little or nothing for yourself, you decide for the people below you instead. Outside of isolated cult communities it has never worked completely like that, but the degree to which things work like that has waxed and waned over time; currently it’s very much on the wane, and they really don’t like this either.
Due to both of the above, they’re in danger of losing their kids, whether by having the authorities taking them away (less likely) or their children becoming alienated to them (more likely). This is seen as a fundamental violation, not merely of their right to raise their kids as they see fit, but also of the social contract which they “agreed” to (more likely, were forced to “agree” to) where they give up control over their own lives in exchange for control over certain other people’s lives (often just their own children and no one else)… and how is that even fair that they might not even get the benefits which came with their sacrifice?
And of course abuse of any kind is getting harder to hide. For those who engage in it, some distractions are needed. For the non-abusers (and I use the term “non-abuser” generously here) they don’t want to confront the idea that the sexualization of children has already been normalized in some respects. And since it isn’t going away any time soon, we should prepare children to deal with it. Because it would force them to acknowledge that their worldview has been complicit in creating this situation. So they, too, need some distractions to shut down the conversation.