Pesticides may have effects on the timing of puberty. But genetic modification is something completely different. GM crops have their own risks (contamination of wild populations, seed monopolies etc.) but as far as I know they do not affect human health.
Not fully, but I browsed through both, and I (mostly) agree with what they are saying. But they are talking about pesticides, not GM organisms. Again, I’m not claiming that there are no issues with GMOs. But pesticides and GMOs are completely different! You cannot show that pesticides cause X and then claim that therefore GMOs cause X.