Sikhs were considered the champions of fairness, uplifting people, protecting and defending human rights. Defending equality. So when someone sees a Sikh, the turban identifies a person who's going to stand up for rights, even if you disagree with them. The turban is supposed to be a beacon. That someone who is going to help you out.

“With the possible exception of the equator, everything begins somewhere.”

“I remember reading a book set in the future, it was written in the 1870s projecting to 1920, and this time traveler said you couldn't tell the difference between men and women. He saw what was coming.”