1 Corinthians 13:4,5 Love is patient and kind; love does not envy or boast; it is not arrogant or rude.
In regards to love, being rude is closely related to some of the other things Paul lists in his description of what love is and is not. Boasting, for example, is a way of acting rude. Being kind, however, cannot coexist with being rude. They are not compatible.
Suffice it to say, a lot has already been covered about this topic, but an specific area for consideration is sarcasm. Some people may think that sarcasm is not unkind. To them it’s just funny and the other person knows they’re joking. Some of us have a real tendency to lean on sarcasm rather than just discussing something and dealing with it. This is actually a lack of respect for others, which can be hurtful. Sometimes, it’s downright belittling.
There’s something deeper behind the source of our sarcasm. Why don’t we go ahead and get up the courage to deal with it instead of taking it out on our loved ones? You’d be hard-pressed to find a truly happy married couple that speaks to each other with rudeness and sarcasm regularly. Even if it’s done in a joking manner, it does affect the person on the other end. If we love them, we won’t treat them rudely or degrade them with our words.