"Deserving" is a concept that depends really much on the society. There are no consensus on that. "The right thing". Well, it depends on the definition of "right". In that context, "the right thing to do" for me would be using words that allow others to understand my point of view and be open to it. I don't believe that insulting does the job. Now if it did, why not, but it obviously does not. Insult is an easy thing that anybody can do. As far as i'm concerned, it gives me much more input on the person that insults (that fails to see the usefullness of that technique) than the insultee. Did it ? I mean, that quote in particular ? Or are you referring to the bible ? In that case, the bible cannot be reduce to one quote in it. It's like taking you word out of context. And even if it was the case, other mechanism much more powerful and other than insults are at work in the religion so that they manage to convince somebody. Religion analyse the fear of people and put an explanation to it. Then it allows them to gain trust to the people to manipulate them. I find much more interesting other techniques such as expressing one's point of view and trying to understand the other ones point of view (you can't build a world alone), than insulting or using manipulation techniques used by religion.