It is misconception that Sikhs are Muslims because of similarity of beards, turbans and domes over gurdwara and mosque.
Sikh History and Islam;
The 5th Guru Arjan was martyred by the Mughal ruler Jahangir on 16 May 1606 for refusing to convert to Islam. The reason for 5th Guru Arjun Dev Sahib's martyrdom is evidenced by an entry made in Jahangir's autobiography. "In Goindwal, on bank of river Beas lived a Hindu by the name of Arjun in the guise of a Pir Fakir (eminent mendicant). He not only persuaded many innocent Hindus, but some naive and ignorant Muslims also to be his devotees; and was loudly beating his drum to proclaim his pious eminence and closeness to the God. People called him guru and came from all directions to congregate around him. They (the Sikh Gurus) have operated this prolific business briskly for three to four generations. Often the idea had come to my mind to either put an end to this nefarious business or to convert him to Islam. I was totally aware of his scam so I ordered that he be arrested, brought before me, his children be turned over to Murtza Khan (Governor of Punjab), his property be confiscated and he should be tortured to death." He was asked to convert to Islam (wear a topi). He refused. He was then made to sit on a burning hot sheet while boiling hot sand was poured over his body. After enduring five days of unrelenting torture Guru Arjan was taken for a bath in the river. As thousands watched he entered the river never to be seen again.
The 9th Guru and his four companions were summoned into the council chamber of the Red Fort by Mughal Emperor, Aurangzeb. He was asked that he should embrace Islam.(by wearing topi). On the Guru's emphatic refusal, they were ordered to be imprisoned and tortured until they agreed to embrace Islam.
After a few days, On 9 November 1675 A.D, Guru Teg Bahadur and three of his companions Bhai Dayala, Bhai Mati dass and Bhai Sati Dass were produced before the Qazi of the city. The Qazi turned to Mati Das first and asked him to embrace Islam. He refused to do so. He was condemned to an instantaneous death. Mati Das while standing erect was tied between two posts. He was asked if he had any parting words, to which Mati Das answered, "I request only that my head be turned toward my Guru as I am executed." Two executioners placed a double-handed saw on his head. Mati Das serenely uttered "Ek Onkar" and started reciting the Japji Sahib, the great morning prayer of the Sikhs. He was sawn across from head to loins. It is said that even as the body was being sawn into two, the Japji continued to reverberate from each part until it was all over.
Thereafter Bhai Sati was asked to embrace islam or face death. Bhai Sati dass also refused (to wear topi) Dass Bhai Sati Das was wrapped in cotton and set to fire by the executioner. He remained calm and peaceful and kept uttering Waheguru, waheguru-, waheguru-, waheguru, Waheguru....
Then the Qazi pronounced his religious order that Bhai Dayala must either accept Islam or be prepared to embrace death by being boiled in a cauldron. Bhai Dayala refused. He was tied up like a round bundle and thrown into a huge cauldron of boiling oil. He was roasted alive into a block of charcoal. The Guru witnessed all this savagery with divine calm. Bhai Dyala was Rajput and Bhai Mati Dass and Bhai Sati Dass both were Brahims.
The Guru was put in chains and ordered to be tortured until he would accept Islam. Refusing to do so, Guru Tegh Bahadur was beheaded at Chandni Chowk on 11 November 1675. Guru Tegh Bahadur is popularly known as "Hind Di Chadar". His head was carried by Bhai Jaita, a disciple of the Guru, to Anandpur where the nine-year old Guru Gobind Singh cremated it. (The gurdwara at this spot is also called Gurdwara Sis Ganj Sahib).The body, before it could be quartered, was stolen under the cover of darkness by Lakhi Shah Vanjara, another disciple who carried it in a cart of hay and cremated it by burning his hut. At this spot, the Gurdwara Rakab Ganj Sahib stands today. Later on, the Gurdwara Sis Ganj Sahib, was built at Chandni Chowk at the site of Guru’s martyrdom.
The two sons of 10th Guru Gobind, Zorawar (9 years old) and Fateh (7 years old) were offered safe passage if they became Muslims (wear a topi). Both refused, and so Wazir Khan sentenced them to death. They were bricked alive at Fatehgarh Sahib. Madhodas Bairagi, a Kashmiri Pandit (Dogra Brahim), commonly known as Banda Bahadur, defeated Mughal forces and beheaded Wazir Khan.
The Sikhs are the Warriors who are the Protectors of the pacifist Hindus. The first born male of the Punjabi Hindu Family is given to the Sikh Panth to grow up as a highly skilled Warrior and fight for his people when the time comes.
Islam prevailed over Sikhs during a short period prior to 1984 when they gave weapons to a fringe group of Sikhs to attack and take control of Golden Temple. Islamic forces supplied Ak 47s, Ak56s and RPGs. With the help of these weapons, mass Killings became a daily affair with people being shot in markets, buses, trains and parks. Blood of innocents flowed in the streets. A total of 11,694, innocents were killed out of whom 7,139 were innocent Sikhs. Islamic forces also supplied anti tank mines, machine guns, bombs, rocket launchers etc with which they destroyed Golden Temple and converted it to fortified military garrison Everyday they paraded deadly weapons on parikarma of Holy temple threatening and overawing devotees. Golden Temple came under complete subjugation of Islamic forces and became a place of torture, rape, extortion and death. Young girl devotees were kidnapped and raped. Sikh devotees were tortured, money extorted and killed. Dead bodies of Sikh devotees were found in severs of golden temple almost on daily basis. In an operation which began on 3rd June 1984, Indian army finally freed the Golden Temple from Islamic control/supporters for peaceful use and possession of Gurudwaras by Sikhs. Link. What better day than the anniversary of 5th Guru Arjan Dev Ji (which fell on 3rd June in 1984) who was 1st Sikh Guru to lay down his life rather than be under control of Islamic forces (supra) to liberate the Golden Temple from Islamic control or fringe group of terrorists.