I think my (26M) girlfriend (25F) is just close minded. How do I deal with my girlfriend’s refusal to even listen?

Context: girlfriend of 2 years

Since I saw a similar post here on Reddit recently I remembered this incident again:

A couple months ago I was looking through old photo albums together with my girlfriend and we came across a photograph where you could see my mother sitting around in underwear and bra at home.

Where I’m from (Southern Europe) summers get pretty hot and most people don’t have AC in their home. So lots of people just lounge around in just their underwear at home when it’s 1000 degrees hot.

My girlfriends response was “aww you poor thing, that must’ve been really traumatizing for you to grow up like this”. I initially chalked this up due to her coming from a different country and told her “no, not really, a lot of people here do that in the privacy of their own homes”

But she insisted “sorry, no, it’s just weird” and I told her “it’s not weird unless you make it weird. People go to saunas too and there’s nothing wrong with it.”

I mean, I could understand if someone was in disbelief at first. But what left a bad taste in my mouth was that instead of listening and trying to understand, my words were immediately met with judgement and prejudice.

So I tried talking it through with her and said something along the lines of “yeah, but why would it be intrinsically weird or wrong when It depends on what culture you were raised it. Finns go sauna all the time and nobody there thinks it’s weird, but someone raised in Afghanistan would feel a different way about it”.

And instead of responding to the argument, she just got annoyed and replied “no, sorry, it’s weird and it’s not right. I’m dying on that hill”. This went on for another 20 minutes before I gave up.

It’s not even that I’m suuuper passionate about defending my right to wear underwear in my home, we have AC anyways. But what ticked me off was how unwilling she was to even entertain a different perspective or have a thought experiment.

Honestly, I don’t know what to think. This has left a bad taste in my mouth and I can’t just forget it. And what’s worse, I’m not even sure whether I can even talk to her about it. I’m afraid she might just go “but it is weird though, case closed. Why are you trying so hard to win that argument?”

I don’t know what to make of this. How do I deal with my girlfriend’s refusal to even listen?

Tl;dr: I tried talking about cultural differences with my girlfriend, but instead of listening or responding to my arguments, she just got annoyed and met my points with prejudice