Guru Gobind Singh 's father , Guru Tegh Bahadur , was beheaded for refusing to convert to Islam .
When his father , Guru Tegh Bahadur , was beheaded for Saving Hindus who were brutally killed for not accepting islam , Guru Tegh Bahadur BBC Religions ( 2009 ) Guru Gobind Singh was formally installed as the leader of the Sikhs at age nine , becoming the last of the living Sikh Gurus .
Guru Gobind Singh