I said 'no worries' because in normal contexts, you'd be right in that there is no issue. But in gender discussions both sides aren't accepting of commentary that switches focus to the other gender, but you may not know that if you don't join in on them often.

Obviously I can't speak for the person they responded to, nor the people reading these messages for that matter, but I can try and be reasonable. What reasonable person is going to want to do anything other than bury the hatchet after an honest mistake?

Edit: oh and sorry for getting a bit snippy with you.