Insults are hurled because the “hurler'” instinctively knows it’s
These "hurlers" do well with stereotypes. For example, they generally assume most people dislike not having enough and strive to make more money. They trust that fat people tend to hate themselves and that people of certain races bemoan their origins. With this information, they fire random bullets with the intent to bring us down emotionally.
A lot of insults or snide comments are based on an assumption of shared values, with the insult-