This is essential spiritual counsel especially for all of us who confront Islam. Another way to think of it is to consider that we are treating a poison, and we must not become infected with it ourselves.
May the Holy Trinity bless us in this work . . .
Correcting, Not Condemning, Evil
By Elder Porphyrios of Kapsokalyva
Our purpose is not to condemn evil, but to correct it. With condemnation people can get lost, with understanding and assistance they will be saved.
Evil begins from bad thoughts.
When you are bitter and indignant, even just with your thoughts, you spoil a spiritual atmosphere. You prevent the Holy Spirit from acting and allow the devil to increase the evil.
You should always pray, love and forgive, driving out of yourself every evil thought.