Or sometimes people talk down to and/or reply sarcastically in reply to a comment because said comment was abysmally stupid, not to put too fine a point on it.  Saying so doesn't mean one is "overcompensating" for something--a stereotypical accusation female disputants tend to hurl at males during disagreements.  Believe it or not one can genuinely find another's argument ridiculous, and consequently ridicule it, without being compelled to do so by "psychological issues".  In my experience such accusations usually prove to be a means of avoiding actually replying to factual arguments which one cannot refute--i.e. evidence of logical fallacy, not "insecurities" (except perhaps on the accusers' part).