I lived in a house for many years with an open door policy so I have to admit to not being a door shutter. 😂 It's a habit more than bad manners in my case.
After living in Thailand, I can now see where you are coming from. But, honestly I would have been that tourist. I come from Scotland where aircon is practically non existent and I didn't realise air con works better when doors are kept shut. I'm not a stupid person but due to not experiencing air con I was ignorant to how it worked. So maybe just consider it was not done from thoughlessness but from totally innocent ignorance.