A big thank you to +Greydon Square for the following video. Have a look.
There are a few reasons why I like this video:
1. A respectful discussion is a two-way street. If someone is entering a discussion without the possibility of having their mind changed, that respect is missing.
2. If everyone has this attitude with evangelists, street preachers and door knockers it would maybe cause them to rethink their position. Maybe it will occur to them that being closed minded is not the kind of thing that other people appreciate, and why it is such a problem.
3. We only have finite lives, and wouldn't we rather spend that time discussing things with open minded people who are willing to listen to what we have to say.
4. It is more likely that open minded people are mistaken less often, because facts and logic change their minds, and therefore they hold more valuable information that anybody would more likely want to listen to.