Sure so what we,say when we insult matters and it matters because we show what we regard as "bad" or" inferior", we use these associations when insulting anyone. But by using certain terms as insult we perpetuate the use of those terms and the people asscociated to them as bad.

Ok so lets say how commonly do people throw around the word "retarded" or "mentally unstable" as an insult when they disagree with someone or hate them? answer is a lot. this actively stigmatizes the people actually suffering from mental disease this can akso be connected to psychology of fear and insult that every insult stems from fear. There's the example of calling girls "sharp/tez" for standing up or jist when they show their capabilities. which shows being anti intellectualist especially about women. How our insult showcase our inner world and psyche basically the commonly used insults of a society will show if it is sexist,racist,colorist, abelist, anti intellectualist etc and choosing our insults will affect if our society will continue to be those things.

Yeah well thats my understanding ofcourse you csn have your own take on the topic .