Religion is outmoded as a primary social force and has been since Napoleon, but churches are cultural monuments. It's doubtful that religion will ever be phased out someday. This thread proves that. Religion is an evolutionary psychological response to an absence of understanding of the good and bad, and for social pressure in groups. It's a convenient thing to tap into to rile people up. It's like superheroes and experts in the West and one party states in the East. However, it would have been one party states in both cases had Hitler or Napoleon won.
It's not a race or ethnicity issue, even if these did lead to the evolution of different religions and the antagonistic relationship between them. Religion comes from the same evolutionary sources as superstition, philosophy, ideology, certain kinds of psychology, and, in a more general sense nationalism, feminism, and all other forms of group thinking. The only way to get rid of it is to make it unnecessary, and that's not possible without national homogeny at the country, if not global, level, and at that point it may regress into a voluntary cultural tradition. While leftists cling to the idea of a future grey race, I think that the mingling of so many predispositions will lead to greater barbarism and adherence to religion. For instance, the Latinx are very sick people at the national level and are desperate to cling to religion. They lack a single nation and are a sea of ethnics, co-ethnics, and contra-ethnics. There's no unity except against antagonistic forces and for the Church.