Bismillah. It is reported in Sahih al-Muslim that when sending out a mission, Allah's Messenger (peace and blessings be upon him) would say: "Give glad tidings to people, and do not alienate or repel them. Make matters easy, and do not make matters difficult."
As we have done ourselves or experienced; some of our brothers and sisters take a rough approach in dealing with others and in calling to Islam. However, this is not the Sunnah of Allah's Messenger, peace and blessings be upon him.
Once Abu Darda' (may Allah be pleased with him) passed a group of people crowding around a man. They began insulting and beating the man. He came up to them and said: "What's the matter?" "This is a man who has committed a grave sin," they replied. "What do you think you would do if he had fallen into a well?" asked Abu Darda' (may Allah be pleased with him). "Wouldn't you try to get him out?" "Certainly," they said. "Don't insult him and don't beat him. Instead admonish him and make him aware of the consequences of what he had done. Then give praise to God Who has preserved you from falling into such a sin." "Don't you hate him?" they asked Abu Darda'. "I only detest what he had done and if he abandons such practice, he is my brother." The man [one who had sinned] began to cry and publicly announced his repentance.
Allahu akbar. The wisdom and the beauty of the methodology is inspiring - something for each of us to reflect upon and enact within our lives. This is just one of the reasons the Sahaba (may Allah be pleased with them all) used to refer to Abu Darda' (may Allah be pleased with him) as the wise one. May Allah guide us with the wisdom to use knowledge in the best of ways. amin.