Vicarious dissonance
https://www.ncbi.nlm.nih.gov/pubmed/12872884
Hypocrisy corrupts.
http://www.bbc.com/future/story/20190520-how-your-friends-change-your-habits---for-better-and-worse
https://www.ncbi.nlm.nih.gov/pubmed/12872884
Three studies support the vicarious dissonance hypothesis that individuals change their attitudes when witnessing members of important groups engage in inconsistent behavior.
Hypocrisy corrupts.
http://www.bbc.com/future/story/20190520-how-your-friends-change-your-habits---for-better-and-worse