Actually, the reason why it was in quotation marks is because I was quoting you.
I would say that a Sikh would have to be in full garb for this to go....
The last Guru, Gobind Singh, expanded the religion to the brotherhood of the Sikhs. He taught that the Sikhs were to throw off all divisions of caste, colour and creed, and adopt the common surname of “Singh” for men and “Kaur” for women. Gobind Singh also established baptism for the Sikhs, called the Khalsa brotherhood. In this ceremony, a Sikh is baptized and becomes an orthodox Sikh, embodying the five symbols of Sikhism. As brothers of the same family, all Sikhs resemble each other by wearing the five K symbols:
“Kesh” (uncut hair): The hair is a symbol of faith, and keeping long hair confirms a Sikh’s belief in the acceptance of God’s will, and teaches them humility and acceptance.
“Kangha” (wooden comb): Sikhs use a small wooden comb because it symbolizes cleanliness and serves as a reminder to keep their mind clear of impure thoughts.
“Karra” (steel bracelet): Sikhs wear a steel bracelet on the right wrist, to show their bond to the Guru and among themselves in the brotherhood of Khalsa.
“Kachha” (short breeches): Sikhs wear a pair of shorts that are slightly longer than underwear, which symbolize a high moral character.
“Kirpaan” (blade): Sikhs wear a blade, approximately, 6” - 9”, on their bodies to symbolize self-respect and self-defense. It is an insult to refer to this article of Sikh faith as a knife.
Somehow I think that “Thou shalt not commit adultery” thing and wearing a ring to symbolize one’s commitment to it, is a symbol too.
“Central” is pretty vague.
Oops. Sorry for the misreading.
As for what you list of the Sikh beliefs: what you listed are not optional for Sikhs. Certainly some Sikhs are not observant, but you wouldn't force an Orthodox Jewish student to eat a ham sandwich, just because a Reformed Jewish student did. (Unless you were an anti-Semite.)
Nowhere in the foundations of Christian practice are Christians commanded to wear "virginity rings." That was made up by a minority denomination. I'm not knocking it as a practice, but claiming that it has the same degree of important to Christians as the five K's have to Sikhs is offensive to both religions.
Finally, "central" is not vague. As a Catholic I can certainly tell you what is central to my faith and what isn't. If you can't distinguish between central, secondary and tertiary practices, in your faith, then maybe you should find a stronger faith.