My coworker microwaves fish every single day, the entire floor knows it, and the entire floor hates it, but nobody has said anything because nobody wants to be the one who speaks up.

Well last week, I did.
I knocked on her office door and, as kindly as I could, told her that the smell from the fish was traveling across the entire floor and making it difficult for people to eat at their desks.
She looked at me as if I had insulted her entire family, she said she had dietary restrictions and that this was what she could eat, she also pointed out that she had been doing this for two years and no one had ever said anything.
I told her I understood and wasn’t trying to make her feel bad, i just wanted her to be aware of how far the smell was spreading.
She went to HR.
HR called me in and said a complaint had been filed against me for creating a hostile environment.
I am someone who politely mentioned a fish smell.
The floor is on my side.
HR appears to be on hers.
And now I’m sitting here, genuinely unsure how I became the villain in a story about microwaved fish.
Was I wrong to say something, or is this one of those situations where someone had to?