Naw, a neutral reply would have been along the lines of "You shouldn't do that. 'A female' is a derogatory remark; you should say woman." Explaining it would be continuing to give the reason why, such as the alt-right context. It's clear you have a frustration about it, but tell me, if a six year old who doesn't know any better came to you and said female instead of woman, do you think your response would be appropriate? I'm not saying you were being mean, but it was definitely passive aggressive, which is definitely not something that goes in hand with educating someone. Furthermore, you're continuing to be aggressive with me, by saying my perspective is skewed; you're completely disregarding that anyone could interpret it differently when a few people have said exactly that already.