In acknowledging the existence of human nature, you must further acknowledge that "nature" may indeed differ in character and magnitude when comparing men and women.
This may be the problem in a nutshell. There is no single quality called human nature. "Human Nature", as I have said, it the result of the interplay of many traits and is bounded by the best & the worst of human activity.
Saying that this "human nature" is something that can be measured in aggregate and is different in men & women in character & magnitude is asinine. Human nature does not have a character or magnitude axis because it is a totality. That is why I talked about facets of human nature or traits.
Far from it. It's what you have to disprove in order for your assertions to have any validity. But you know that don't you, hence your retreat into incredulity.
Rather, it is asinine to assert one can not enjoy a high degree of confidence in the physically aggressive response of one sex as opposed to a more oblique aggressive response from the other, given sufficient provocation.