Like the blue and black dress that was also white and gold. And then Yanni and Laurel.
It seems that even with concerted long term effort, people can't seem to change their own perception as being anything other than "right". If you grew up worshipping purple (team colour, or monarchy) then you have an impossible time cheering for the red or green team.
I mean, how do you tell a scientist that the earth is a doughnut? Is it even possible to change, or should it simply be left to the next generation?