Are you upset because a man said it? "Math is too male and we need to come up with more female ways of teaching it" is a pretty standard feminist idea. In fact, replace "math" with a wide variety of things.

Recall he's not working under modern PC strictures, not that he necessarily would have subjected himself to them anyhow. He gets to say it directly, not cloak it in endless verbiage.

That said, I actually disagree. Math is what it is and everybody regardless of gender must bend their brain to the subject and not the other way around. I think its fundamental inhumanity is dominant. But you seem to me to be casually implying that his statement is un-PC, and I think it's actually rather shockingly PC, just also very blunt.