I think that these sorts of situations tend to have a mix of factors, and that "people love giving lengthy explanations about how other people are wrong" and "p

I think that these sorts of situations tend to have a mix of factors, and that "people love giving lengthy explanations about how other people are wrong" and "people have an implicit bias against women, especially in areas like math" likely both were contributing factors to the backlash. It's probably impossible to know how much each one contributed, but I think it's likely that both were significant.