What is the Sikh religion?
Sikhism is a religion with roots in Hinduism. Followers of Sikh believe in One God, however, they also believe that all Attributes of God (the entirety of Creation) are themselves divine.
In this way, the Sikh religion is a combination of Monotheism and Polytheism, believing that God is One, and still manifests Himself in every particle of creation.
In my opinion, Hinduism is also a combination of Mono and Polytheism. However, Sikh has taken the idea further, emphasizing that their adherents worship the One God, rather than his Creation.
In the Gurū Graṅth Sāhib, the Sikh scripture, the concept of the supreme reality is dynamic.
The many pluralities represented by concepts such as nirguṇa-saguṇa or the transcendent-immanent are subsumed in it. God is nirguṇa or without attributes. Yet God is saguṇa or with attributes, too, because in the manifested state all attributes are divine.
At the same time the ultimate reality of God never binds itself to any specific forms of image. Sikhism clearly rejects avatārvād or belief in divine incarnation and idol worship.Sikhism is, simultaneously, a mystical and practical religion. The mysticism is evidenced by it's belief that all things are infused with God essence. It's pragmatic approach is evidenced by it's emphasis on service:
Sikhs are not required to renounce the world. They aspire to live the life of a householder. Seva (selfless service) is an integral part of Sikh worship, very easily observed in the Gurdwara. Visitors of any religious or socio-economic background are welcomed, where langar (food for all) is always served to people of all origins, the same (vegetarian) food, while sitting together on the same level of the floor.Additionally, Sikhism places an emphasis on the acceptance of other religions and means of self-expression. This has led adherents of Sikhism into the inevitable conflict with Islam:
Protecting the religious and political rights of all people and preventing discrimination is an integral part of the Sikh faith. The 5th Guru Arjan Dev was martyred by the Mughal ruler Jahangir on 16 May 1606 for refusing to convert to Islam. The martyrdom of Sri Guru Teg Bahadur Ji 9th Guru to protect Hindus from religious persecution, in Delhi, on 11 November 1675 AD, is another example of upholding minority religious freedom; he gave his life to protect the right of Kashmiri Hindus to practise their own religion when they were being forced to convert to Islam by Aurangzeb, the Mughal emperor at the time.Sikhs do not cut their hair. For this reason, the beards of Sikh men tend to be very long. They wrap their long hair in a turban.
This is what a Sikh man looks like:
Islam, on the other hand, stipulates that the Muslim man ought to trim his mustache and let his beard grow. Some Muslim men shave their moustache entirely and let the beard grow, others only trim the moustache.
Many Muslim men believe their beard should be long enough to grasp in their hand, and no longer. This is supported by a Hadith regarding Mohammed's way of shaving:
Ibn 'Umar relates from the Prophet (Allah bless him and give him peace) that he said: "Do otherwise than those who ascribe partners to Allah (al-mushrikin): leave beards be, and trim mustaches." And ibn 'Umar, when he went on hajj or 'umra, grasped his beard with his hand, and removed what was in excess of it (Sahih al-Bukhari. 9 vols. Cairo 1313/1895. Reprint (9 vols. in 3). Beirut: Dar al-Jil, n.d., 7.206: 5892 and Sahih Muslim, 5 vols. Cairo 1376/1956. Reprint. Beirut: Dar al-Fikr, 1403/1983, 1.222: 259).Muslim men vary greatly in their appearance, but here is what a Muslim man (who is following the Koran and Hadith with regard to shaving) tends to look like:
However, many Muslim men shave their beard and moustache entirely, or have some combination of both, or leave themselves fashionably, and partially, unshaven at all times.
In general, there is not a lot of consistency in the appearance of Muslim men.
Sikhs on the other hand are very consistent in their appearance.
Learn more about Sikhism.