Disagreement's not the problem it's cracked up to be

Respecting people’s right to disagree with you, doesn’t diminish or increase the truth of your opinions and beliefs. The idea that we need to fight people when they disagree with us, is a myth. Kindness is always an option.

People who agree with you might overlook rudeness, but courtesy will even win the respect of those who disagree with you. Try it and see!