We are told in the catechism to repremand sin, i believe. Today at school I was in a horrible situation where people were lying and saying that I had blasphemed against Our Lady, which I had definitely not done. Before I knew it, a crowd of them was gathering around me uttering the most obscene insults against her and saying repulsive things about our mother. I tried to repremand them calmly, but I must admit, I lost my temper after this had continued for several minutes. I lost control and nearly slapped the face of one of them, but fortunately I missed.
Bearing in mind that we should reprimand and correct sin, how should situations like this be handled in a catholic and Christian way, without committing the sin of anger.