I will never understand the mentality that emboldens some people to treat complete strangers with total disdain, addressing them rudely and generally behaving obnoxiously. What is it that causes an old man in the street to yell at a mother and her daughter: “We’re in England… speak English…”? What is it that enables a woman to swear aggressively at a family enjoying a quiet meal in a restaurant? What causes some humans to obliterate others? Where does this mindset come from?