What is "Normal"?

Prior to recent years, it has been determined that men and women are different. They react to situations differently, speak differently and move differently. Therefore, the two different genders have been given two different roles in society. Men bear the duty to protect and provide for the family because of their naturally sturdier build. Women, on the other hand, are seen to have a gentler attitude and the ability to express their feelings in a clearer manner. Accordingly, they are inclined to care for the children as well as undertake the majority of household chores. This is what society generally saw as normal.
However, over a couple of decades, this definition of "normal" took a sharp turn and transformed drastically. Men, as well as women, are now providing for their family. Furthermore, women have almost no constraints on what jobs they can acquire. Two women are running for President as I type this. Moreover, it is popularly believed that it is very difficult to live in today's era without both sexes holding a profession. The traditional responsibilities of women have also been shared with men. Males are now chefs, and spectacular ones at that. The most popular example being Gordon Ramsay, the despised yet beloved host of the primetime competition "Hell's Kitchen".
Considering the extraordinary transformations that gender roles have taken during the last decades, it's completely blasphemous that someone was killed for the feminine fashion in which they walk. Whole civilizations have altered their way of viewing men and women and now they have equal opportunities in pursuing whatever their goal might be. Yet somehow, for something as simple an action as walking, conventional gender norms are aggressively forced upon some with fatal consequences if he/she fails to comply.
The only explanation one can imagine is that the robust and deeply rooted gender norms of how men and women should behave has yet to mix with each other in society the same way their roles have. The incorporation of behavior traits into each gender's norms has yet to occur. Or perhaps it has but it is not yet popularly assimilated into society. It is not yet prevalent. Humans have a desire to fit in, so if a group begins to persuade others to change their beliefs about gender norms, instances such as the one told by Judith Butler would eventually cease to ensue. Slowly but surely, the gender norms as a whole, will cease to exist. It all depends on public belief.