Richard Dawkins recently explained that he self-identifies as a cultural christian. He doesn’t believe in Deus, but he enjoys many christian traditions, including carols and hymns. This particular article is written from a Christian perspective, which I do not personally agree with, but it correctly interprets that Dawkins’ cultural christianity seems to be a dogwhistle for whiteness. Many atheists like Dawkins are cultural christians, in ways that subtly reinforce white supremacist narratives.
That’s only a VERY recent change, within the last decade. Before the 1980s (ie the first half of his life) Christians made up 80-90% of the population.