Is it normal to suppress your feelings to appear polite?
It is customary for my stepfather to suppress our feelings and be polite instead, even if we would like to throw our counterpart in front of a moving car. My biological father doesn't see it quite so closely, but he also taught me that.
Every time someone bumps into me or cuts me off or cuts in front of me, I'm expected to politely apologise. It's starting to drive me crazy.