You're conflating "being honest" with "being a dick", here. John may experience anger at Jack's behavior, and he may express it in a way that doesn't have to da

You're conflating "being honest" with "being a dick", here. John may experience anger at Jack's behavior, and he may express it in a way that doesn't have to damage his relationship with Jack or hurt Jack's feelings. A good book on this subject is "Difficult Conversations", a favorite of my wife's, which describes strategies for doing exactly this: being honest about your feelings without ruining someone else's day as a result. Being honest does not mean you cannot exercise tact and discretion in the way you talk to people.