In my humble opinion, I believe that religious and social extremism leads to gender discrimination.

In the name of religion and culture, both the genders have been facing discrimination. Say for example, in a typical Muslim oriented culture, women are not allowed to work, raise voice, or speak against the decision of alpha males in the family. They are expected to cover their body from head to toe and males are given the freedom to stare (Even though lowering the gaze is a form of 'hijab' for men, staring is not a crime in Muslim nations). In such cases where women are oppressed, males take advantage of the situation and women are found to be the victim of domestic violence and exploitation. They fear to raise their voice against such atrocities due to cultural inadequacies against women which ultimately leads to suppression.

In other cases where extremism is not applicable, ego problems (superiority/inferiority complex) might have led to such problems.