Earlier quoted context omitted.
His cardinal sin was saying that men and women are biologically different. He could've said a lot, but as soon as he tried to give a biological explanation for why girls prefer Barbies and boys prefer toy cars, he entered taboo territory. It's a thought crime because it implies that cultural influences aren't 100% responsible for why more men are interested in STEM than women.
No, he tried to use unrelated data on the biological differences between men and women to justify why Google shouldn't try to reach out more to women to diversify their workforce.
Edit:
I don't think that either side in this debate has actually met the burden of proof necessary to conclusively say that biological differences do/don't correlate on any level.