Trotsky, Leon. "Leninism & Workers' Clubs," 17 July 1924. In: Problems of Everyday Life and Other Writings on Culture and Science (New York: Monad Press, 1973).
I could not find this article in the huge repository Marxists Internet Archive, but after much searching, I found just the section I needed on another web site:
How socialists fight religion
Without checking, I cannot be certain whether this excerpt is the same English translation I originally consulted. As it happens, I translated this into Esperanto many years ago:
El Kontraŭreligia Propagando de Leono Trockij,
en: Ateismo 3: 1-3 (7-9), januaro-septembro 1991, p. 20-21.
I found an echo of this statement in a later article by Trotsky:
Trotsky, Leon. "Culture and Socialism" (1927), translated by Brian Pearce.
Here is the choice extract:
Relations in either socialist or communist society, i.e., in socialist society's highest development, will be thoroughly transparent and will not require such auxiliary methods as deception, lies, falsification, forgery, treachery and perfidy.
However, we are still a long way from that. In our relations and morals there are still many lies rooted both in serfdom and the bourgeois order. The highest expression of serfdom's ideology is religion. The relations in feudal-monarchal society were based on blind tradition and elevated to the level of religious myth. A myth is the imaginary and false interpretation of natural phenomena and social institutions in their interconnection. However, not only the deceived, that is, the oppressed masses, but also those in whose name the deception was carried out – the rulers, – for the most part believed in the myth and relied upon it in good conscience. An objectively false ideology, woven out of superstitions, does not necessarily signify subjective mendacity. Only to the extent that social relations become more complex, that is, to the extent that the bourgeois social order develops, with which religious myth comes into ever growing contradiction, religion becomes the source of ever greater cunning and more refined deception.
Developed bourgeois ideology is rationalistic and directed against mythology. The radical bourgeoisie tried to make do without religion and build a state based on reason rather than tradition. An expression of this was democracy with its principles of liberty, equality and fraternity. The capitalist economy, however, created a monstrous contradiction between everyday reality and democratic principles. A higher grade form of lying is required to fill up this contradiction. Nowhere do people lie more politically than in bourgeois democracies. And this is no longer the objective "lying" of mythology, but the consciously organized deception of the people, using combined methods of extraordinary complexity. The technology of the lie is cultivated no less than the technology of electricity. The most "developed" democracies, France and the United States, possess the most deceitful press.
There are several articles in English online on Trotsky, the Bolsheviks, and religion. My initial approach is to look at their theoretical statements, see how they measure up and to what extent they are relevant today. The next step of course is to research and examine their actions, which may or may not be in accord with their theory.