I think that was a stab at you saying “living in the south” as if it automatically meant south of the USA. So your US-centric world view shines through. I think no one wanted to attack your world view per se, but rather your bias.
And regarding your second comment, why so passive-aggressive? Obviously the US lives in everyone’s head rent free because it messes around with the whole world. Don’t get offended by people trying to point out that there is more in the world than one single country.