Great quote:

Finally, human individuality finds its greatest support and its highest appreciation in religion. Only as a personality can man turn to God and only through this dialogue does
he realize himself as a person commensurate with the person of God. It is for this very reason that socialist ideology and religion are mutually exclusive. (Of course, if either
of these world views is underdeveloped, they can coexist for a certain time.) It is natural to see here the cause of that hatred for religion which is typical of the
overwhelming majority of socialist doctrines and states.

Ihor Shafarevich in the Socialist Phenomenon, p. 267