I disagree, you can.You can't make anyone learn.
When my daughter acts in a way towards friends that is not acceptable, it won't help if I tell her that her behaviour is not acceptable - it will make her feel attacked, or misunderstood, or .... any of a number of things. What helps is if I take her mentally through a parallel situation in which the roles are reversed: 'Imagine you are playing at X's house, and X did .... '. Only when she can look at the situation objectively can she look at her own behaviour and emotions objectively. The same thing happens in teaching. The same thing happens in therapy.