what part of "Yoga is synonymous with Hinduism", some of you people are having trouble grasping? "A Yogi is either one who wants liberation from all worldly suffering and the cycle of birth and death, at which point there is a realisation of identity with the Supreme Brahman (the ultimate Reality or supreme self). In the Mahabharata, the goal of yoga is described as entering the world of Brahma.
or It is a service to svayam bhagavān (Sanskrit for "The Lord" or Lord Himself),which is the ultimate goal of the yoga process, wherein perfection culminates in an eternal union with hindu trinity or gods Vishnu, Rama or Krsna"
BTW. In Hinduism every living being is Brahman and It is said:"Any one who knows the supreme Brahman becomes Brahman indeed" what better way to find him than to become a yogi? You can read all about it in > Bhagavad-gītā