Sorry vector, but I wont buy your take. Not as tendered anyway.
It makes a fatal assumption, and runs with it, by begging the question that children raised in such a circumstance will never, and can never, question the conditions of their upbringing. I can assure you, from personal experience, that this is not the case.
What allowed me to see past the bullshit of my **VERY** conservative, Limbaugh-listening, doomsday prepping upbringing, was exposure to good and correct rational thinking and quality educational materials.
I will tell you straight up, that fighting indoctrination with more indoctrination, is how you alienate kids that were like I was, and make them unwilling to listen to anything. (you instead trigger their very early, and forming, balogna detection kit, and trigger it hard, making them unwilling to listen to anything you say, and doom your position to the travails of the backfire effect.)
Virtue-signalling is what the "traditionalist" is doing, by shitting on the sidewalk as a public spectacle. Doing your own version of it, by virtue signalling against him, does not really make your position look ideologically superior. Correct and rational positions hold their own without such embellishment. I also resent that you consider my position to be shitting on a metaphorical sidewalk. Rather, it is "Instead of screaming at people, you should provide port-o-potties, and advertise how private and safe they are."
The correct course of action, is to stop pretending that children are tabula rasa sponges incapable of independent evaluation or thinking-- then accept that the circumstance is that the child is being exposed to dangerous ideation at home, and casually suggest mind-expanding literature to them, and asking them to explain why they have the feelings and reactions that they do, calmly and rationally. Support them, and tell them that it will be hard to make up their own minds, as they will be challenged constantly, but challenge is good, and assures that they fully understand, and own their choices.