their female attendees have been... intolerant of the culture of computer gaming

Their female attendees have been harassed and disrespected. You need to understand that there is no such thing as an objective experience; context is the trump card every time. You don't feel threatened when someone trash talks or hazes you at a conference/tournament. Most women do feel threatened. It's up to us as a culture to decide which of those views is "reasonable". I prefer to consider both of them reasonable and search for a viable compromise.