Karl Marx and Max Weber had conflicting views on the role of religion in society. Unlike the functionalist approach who advocated that religion is helpful in maintaining social cohesion, Karl Marx was critical of religion, describing religion as "the opiate of the masses" and Weber challenged religious doctrines with his writing about the Protestant Work Ethic. Discuss the differences in Weber and Marx's theories about religion. Please provide a modern day example to support either Marx or Weber's viewpoint.