So, to summarize, your criticism of Yang is that he's extrapolated a bit from studies, and you dislike the extrapolation but don't have any evidence to the contrary?

That's a bit...um...weak?

Also, care to share the effect size of "supportive, dedicated parents" vs whatever the lack of that is, and contrast to the effect size of one vs. two parents? (Pick some sort of reasonable outcome for the child--not just "had dinner at 7 pm" but something about them having a decent life.) You can do that, right? It's not inconclusive? Because you wouldn't be telling us we could "say for sure" if this wasn't demonstrated to a much greater extent than the stuff Yang's talking about, right?

Also, maybe you want to look into research on the effects of testosterone on aggression and try rephrasing some of your statements for greater accuracy?

If you want to show that Yang is cherry-picking his statistics, actually make the case. Conduct a brief survey of relevant literature, cite the papers, and show that he's misrepresenting things.