Elements of culture are also head-hunting, cannibalism, ritual scarification, painting one's naked body with mud and spending 40 days in the wilderness, male circumcision, female circumcision, neck-stretching, plate lips, filed teeth, wearing penile gourds, tattooing, polygamy, drinking fresh blood from cows, marrying one's first cousin, to name but a few interesting diversions from life in Notting Hill, Muttley, but they're nothing to do with religion.
Of course there are all sorts of traditions within racial groups which contribute to the 'culture' of that group or its sub-groups, but you must keep religion at bay and NOT keep trying to confuse it with RACE.
There are plenty of races who don't (or didn't) have a recognised religion but a system of animistic beliefs based on the spirits of trees, clouds, animals, reptiles and birds. For example, Africans: their beliefs were animistic until Christian explorers came crashing through their jungles to teach them how wrong they were and that Kalulu, the sacred hare, could no more save their souls than stop the Sun in the sky. Africans didn't need Christianity, but the Christians needed souls to save, so they began evangelising the animists and convincing them to change over to their way. Which is why you still have, today, a rather uneasy categorisation of many sub-Saharan African countries as Christian/Animist. If you think of the major colonising countries in Africa, they're British, French, German, Italian, Belgian and Spanish, with the Arab traders/slavers influencing coastal countries with Islam. So you already have C of E, Catholicism, Lutheranism, and Islam all trying to replace the animist beliefs of the different indigenous tribes (although all those tribes would come under the anthropological term 'negroid').
Same with Arabs: an Arab can be a Coptic Christian Egyptian or Lebanese, a Muslim Kuwaiti. So race, per se, doesn't adopt one particular religion: in some areas one is much more prevalent than another, but because one is of a certain race certainly doesn't follow that one is of a certain religion. That's why you must be very careful when trying to drag religion into a discussion on race. The Inuit didn't have a formal religion until beset by earnest Christians, neither did the Tongans or the Solomon Islanders and a whole host of pagan or animist races round the world.
There is DISCRIMINATION, INTOLERANCE, HATRED, and CRUELTY in religious divides, but by no means does it follow that there are differences in the engaged races. You only have to look at how the Protestant and Catholic Christians have torn each other to pieces over the centuries, but are both primarily Caucasian. There are divisions between religions, yes, but it's also the divisions WITHIN religions that make for so much mischief.