When someone is nasty, rude, hateful, or mean with you, pretend they have a disease. That makes it easier to have empathy toward them which can soften the conflict.
The world is not run from where he thinks. Not from castle walls, but from countinghouses, not by the call of the bugle but by the click of the abacus, not by the grate and click of the broadsword but by the scrape of the pen.