You can tell a lot about a person’s character by how they treat people who disagree with them.
For example, in court the most successful attorneys are those who treat opposing counsel with the utmost courtesy and professionalism. Petulance is counter-productive. Pettiness impedes.
I’m told it’s the same in other professions, whether plumbing or politics, engineering or education, baking or bar tending, medicine or music. No matter your occupation or pastime, how you treat those around you – especially those who oppose you – reflects your true character.
And you are to reflect Christ to the world.
“Do not repay anyone evil for evil. Be careful to do what is right in the eyes of everyone. … Do not be overcome by evil, but overcome evil with good.” (Romans 12:17, 21.)