Civility is vastly overrated IMO.
You're the epitome of "I'm a good person because I'm polite when I say brown people are scary"
Human being are dangerous animals. Human life in the days before there was such a thing as government was, as Thomas Hobbes famously and rightly pointed out, nasty short and brutish. After generations and centuries and millennia of being subject to a strong and many times harsh process of domestication (similar in many ways to the domestication of animals) human populations around the world have gradually become more peaceful and civilised. However it is important that that pressure of domestication, what you might call enforced civility, is kept up otherwise the process will quickly start to revert and human society move back towards the nasty short and brutish state.
