It baffles me when I hear someone tell or say that another person or group are unreasonable. 

No sane human being can be said to be unreasonable, because every perceived unreasonable person, need truth and facts that agrees and relates with his/her level of reasoning.

The issue will then be, how patient and consistent can human beings be with each other in making sure that ideas and how they sale such ideas to another person equals to the person’s level of reasoning.

The idea of reasoning with someone or persons outside of you, should be respective and not generalised. 

This is one way the Catholic Church has continuously excelled. It is also one of the strategies that the Church adopts in selling her message of peace.