Watch how a person treats someone who they believe is wrong. You can tell much. If they are snobby, arrogant, hostile, and condescending, they are simple-minded bullies obsessed with control. If they are jealous, defensive, insecure, and petty, they are afraid and lack convictions of their own. If they compromise, enable, flatter, and fawn, they are sneaky opportunists ready to run you over. Such motives will force, coerce, or manipulate.
To truly respect someone even when they’re wrong is to have a heart that wants to help them see, since their “wrongness” is often just the blindness of being behind. This sort of heart is open to seeing the best in another, that there is good on both sides, and that there could also be wrong in the self. It is a harder way, but it treats a person with dignity knowing they are not the enemy; rather they need a light to see further ahead where you are. Be that for them.