This person has a similar philosophy it seems.
Religious distress is at the same time the expression of real distress and the protest against real distress. Religion is the sigh of the oppressed creature, the heart of a heartless world, just as it is the spirit of a spiritless situation. It is the opium of the people.From the above quote, it seems that Marx believed that economic security would make religion irrelevant. (Apparently, there are other major reasons to find religion beyond our economic background, since in rich America religion is common.)The abolition of religion as the illusory happiness of the people is required for their real happiness. The demand to give up the illusion about its condition is the demand to give up a condition which needs illusions.
Communist regimes probably twisted Marx's words, because communism never provided economic prosperity; if anything, it created the "need" for more religion among the communist serfs.