There was a time you needed to wear black shoes, a tie or tuck your shirt inside your pants.
There was a time you had to cut your hair or change your color if you were black.
There was a time you could not get on the bus because you were black.
In the history of the world there are many periods of intolerance and absolute rejection of otherness; as the time humanity killed Galileo because he said the world was not flat. There were plenty of times like these and they continue still. A certain time you could be killed because you were not Catholic, at other times people would kill you because you were Catholic.