I just picked one, but I noticed this more than once. Either the poor are referred to as "trailer trash", "Walmart monsters" or "meth heads". It is just interesting to see how American culture is so anti being poor that it seeps into your language without you knowing.
All cultures have anti poor sentiments as well as empathetic attitudes towards the poor. What is "interesting" here is prejudice attitudes from people like you towards america.
Also stop calling Americans "interesting." Using a term like this is a deliberate insult on a culture or a person. You are examining the culture like it's a lab rat and commenting on how the behavior is "interesting."
You are not an idiot. People do not talk like this in real life by remarking on how behavior is "interesting" to the subjects face. You and others only use these terms behind the anonymity of a forum. Therefore you are aware this is insulting. Stop.
This is a common tactic used to get around the HN rules. You say "interesting" posing it as an innocent remark. It is not, you are conducting a deliberate and insulting attack on American culture here.