Nerd culture developed as a refuge for people who felt marginalized by the mainstream. It developed without borders, definitions, or rules. Based around escapist media taking imagination to a higher level, people could retreat to it as an oasis of fantastical stories. Whether the name was proudly claimed or derisively ascribed, these people became known as nerds.
Unlike many subcultures, nerd culture has no prerequisites for membership. Nerds need no special skills or talents, no race or nationality, and no equipment. Interest and enthusiasm are the only barriers to entry. Nerd culture is, and shall remain, a sanctuary for the sidelined and a reliquary of narratives that speak to a common thread in humanity. Regardless of race, gender, or experience, the doors are open to everyone. Especially to those who need it.
For all of those reasons, it follows that the marginalized populations of today's society would feel a draw to nerd culture. Unfortunately, many members of those populations (women and minorities) often feel rejected when attempting to connect with fellow nerds. And to feel rejected by a subculture that formed as a refuge for the rejected is unfair and backwards. This can come from personal interactions as well as representation and empowerment (or lack thereof) in nerd media.
We must keep the doors open, celebrate the things we love, and try to make them better.