Americans and Europeans both do that

I think Americans just naturally assume for the most part everyone else they talk to online is American.

Whereas Europeans everywhere on social media always saying/tweeting dumb s*** like "Americans can just buy a gun??", "wait Americans don't use the same metric system", "Americans have to pay this much for healthcare".

They have some random obsession with having a comparison of how different their lifestyle is and always trying to make it seem better.

From this site i feel both do that tbh

Feel both groups have a huge ego. "Look how good we are", "no look how amazing we are"

I barely see Asians, latinos or Africans talk like that. Theyre usually more humble. Not saying this is peer reviewed research lol. Just anecdotal evidence lol