Sorry, I probably really misread you. I also read the article again and personally I don't think the situation sounds that threatening - there were a whole bunch of people there, including a good male friend.
Nevertheless, "she could have said something" is of course not an excuse for rude behavior. I wouldn't want to excuse his behavior. As I said, if I knew him, I probably wouldn't like him much and certainly wouldn't encourage him to attend further meetups.