Being evangelical about your passion, opinions, ideas and cause is a key ingredient in making things happen, to inspiring others to follow you on the journey, to influencing people to change.
However, not everyone will share your cause or opinion.
That does not make those people wrong or a lesser person, it simply makes them different. Those who are overly evangelical about their views and judgemental of others who do not share it could be well advised to remember it is all an opinion, where there is no right or wrong.
Being an evangelist is not a badge that makes you any more right or worthy.