Sincerely, the only things that I can visualize to answer this are: segragation and alienation. It may seem like a pessimistic view, but I consider it to be extremely realistic. After all, what did religion bring that we can say was positive? First they segregate people according to their interests (each religion has its rules and its segments), and then alienate them almost completely (something like a "brainwashing" ). If at the end, we'll all pray to the same God... Why so many different paths to get there? What do you think about that?