being female in a demeaning, dismissive way. Now did he mean it in good natured way? Probably.

But it's still an implicit "Oh, this silly guy doesn't know what's going on, let's call him a little girl and tell him to go away because this is where the big boys talk about big boy things he clearly doesn't understand." The context of his post matters, it wasn't just an arbitrary use of female vs male. Without the context of the surrounding posts, sure, you could argue that with a straight face.

Ok, I'll stop blowing this up into a huge deal.