Those who have arguments provide facts, along with conclusions.
Those who have none, provide insults. Matching insults with insults doesn’t prove you grasp the truth. It doesn’t do justice to the truth. It only shows you have no arguments, either. Those who genuinely grasp the truth of something are never tempted to hurl insults. They know they have reality within their grasp. To those they deem intellectually honest, they want to convey it. To those they deem dishonest, they click the mental “delete” button and move on. Insults and disagreements, by the way, are not one and the same. A person might feel insulted by you, even if you did nothing but state facts he does not care to know.