One could see this as going back to archetypes. The stock charge against anyone perceived as scarily different is that they are a threat to the children. There are still a lot of homophobes who rationalise their prejudices by assuming that all gay men are potential paedophiles, even though the vast majority of assaults on children are heterosexual; going back to more brutal times, the threat was expressed as everything from the belief that gypsies steal children, to the many religious groups (not just the Jews) accused of sacrificing babies.
A straw man inasmuch as nobody, either the original author or thir, have made any such assertion. But you would have to assume that the original author was extremely dishonest if they had failed to note cases where the accusations had been found to be true; and certainly I haven't seen any such case in this country, at a time when there have been an unprecedented number of investigations of child abuse.
In any case, one can expose and decry a pattern of false allegations against a given group without having to make the absurd and indefensible claim that nobody in that group ever really committed an offence. Are you honestly saying that you could read that meaning into the original posts?