@Radical_EgoCom Agreed, with caveat.
Marx calling religion the "opiate of the masses" must be taken in the historical context of when he wrote it. Opium was not seen the same in 1843 as it is now.
Unfortunately, comrades tend to zero in on that one portion, rather than its entirety, and do not consider the greater context.
The Deprogram boys had a brief chat about the USSR's suppression of religion being one of the grand failures of that state that led to its downfall. Ep 7, worth a listen.