Maybe you're just biased against normal people? According to the last election, most Americans support Trump. You'd expect a certain percent of the general population to be somewhat right-wing and maybe even rudely so - it's not the early 1990s when only people access to the university mainframe that could get online. Since mobile browsers became popular (around 2010?) being able to type with two thumbs is the only real requirement to comment online.

Hearing gamers swear profusely on a daily basis is the experience of anyone who plays a game with chat.