[cout]

To such people, the classic "I statements" sometimes help.

Instead of saying "that was disrespectful" or "you are being disrespectful", you can say "I feel very disrespected by what you just said and it really hurt." This changes the statement from an accusation to a factual statement about your feelings. The other person can legitimately disagree about whether the statement was fundamentally disrespectful, but the other person cannot reasonably disagree about how you feel. It is then up to the other person to decide how to respond, whether to discount your feelings or adjust their words and behavior to be less disrespectful.