In bhhagvadgeeta Bhagaban Krishan gave preaching to Arujuna only when he surrendered before jagadguru Krishna and said Sishyte aham shadhi mam Twam Prapannam, that is I am thy pupil preach me Isuurrender my self to thy fee And Shri Krishna throuhg Arjuna gave the knowledge Of Karmayoga, Gyanyoga and Bhaktiyoga to the entire world, Any one whether he is na European, African, or Asian, hindu or Muslim as itis not a Religious preaching, it is a Spiritual message.It does not prescrive any particular form of Worship it lays stress on Gyanyukta Bhakti pradhan Karma yoga.t