What are the intentions of the person that is unkind? Is it just a simple way of telling you they are unhappy? Proving your point to make themselves look better? There are many ways to answer the type of behavior that happens when people don’t think about the way they answer you back.
All I have to say is kindness. Stop beating people up. Be kind, be respectful. Life is short and you can’t take back what you have said. It’s not about you.
Jesus teaches us kindness through the gospels and to be patient as He was with His disciples. As Jesus was,we need to follow His ways with others.