Honourable gentleman bittertruth, I agree that, racism might have been with us long before industrial revolution. (eg; why budhism was not followed in India? or why hinduism did'nt have any influence on Chinese?) from my own perspective, these people must have followed their deities associated with their own group or origin. I think same goes to christian and muslim otherwise a man born in Jerusalam should have more followers in the middle east than in europe.  I think racism, however changed it course during industrial revolution. The conception of dividing people by race no longer exist in religion but at work places and societies between insiders and outsiders, native and immigrants.