The above video is a decent book review of the book, The Art of Contrary Thinking found in this link: http://csinvesting.org/2017/12/01/the-art-of-contrary-thinking/
and http://csinvesting.org/2015/12/16/contrarian-investing-part-ii/
You are neither right nor wrong because people agree or disagree with you but because you have your facts and reasoning correct.
Emotionally, going against the crowd will subject you to ridicule.