Last month, Brendan Nyhan, a professor of political science at Dartmouth, published the results of a study that he and a team of pediatricians and political scientists had been working on for three years.They had followed a group of almost two thousand parents,.........>snip<...The goal was to test whether facts, science, emotions, or stories could make people change their minds.http://www.newyorker.com/online/blogs/mariakonnikova/2014/05/why-do-people-persist-in-believing-things-that-just-arent-true.html?utm_source=www&utm_medium=tw&utm_campaign=20140519
The result was dramatic: a whole lot of nothing. None of the interventions worked.
...but there is hope (of sorts) if you read on, plus an understanding that basic prejudices empower faulty memories that stroke said prejudices. Pretty obvious you may say (and I agree) but for those not convinced here's scientific data to further fail to convince you.