[1] - https://www.youtube.com/watch?v=DprAK933Fdg [video][20 mins][2,460,090 views]
[1] - https://news.ycombinator.com/item?id=45226098
[2] - https://www.youtube.com/watch?v=N14ywRyTWVI [video][56 mins]
I think people do not like to hear anything that does not align with their team or their friend circles have convinced them of. Perhaps in the future psychologists will study this behavior.
(My own attempt also received at least one flag: https://news.ycombinator.com/item?id=45253567)