Yes, traditional Marxist-Leninist or "regular" communism fundamentally rejects Christian communism, primarily due to its foundational philosophy of militant atheism and historical materialism, which views religion as a tool of oppression.
The conflict arises from several key differences:
Atheism vs. Theism: Marxist theory, from Karl Marx onward, is explicitly atheistic, regarding religion as the "opiate of the masses" and a "structural obstacle" to be overcome in a classless society. Christian communism, conversely, is a theological view rooted in the biblical teachings of communal living (Acts 2:44) and motivated by God's commands.
Materialism vs. Spirituality: "Regular" communism is based on dialectical materialism, focusing solely on the material world and economic conditions as the drivers of history and social change. Christianity believes in a supernatural realm, divine moral law, and an afterlife, which conflicts with a purely materialist worldview.
Methods and Morality: The methods of traditional communism, which historically have included the use of force, violence, and the supremacy of the state to achieve its ends, are often seen as diametrically opposed to Christian moral codes emphasizing love, peace, and freedom of conscience.
Ultimate Authority: In Marxist-Leninist states, the Communist Party and the state become the ultimate authority, demanding total obedience from citizens. Christianity insists that God, not the state, commands ultimate obedience, creating a direct conflict of loyalty.
While some individuals identify as Christian Communists and argue that true Christian ideals align with the goal of social justice, official communist parties and historical communist regimes (like the Soviet Union) have actively persecuted or suppressed organized religion, viewing the Church as an institution that historically propped up oppressive, reactionary regimes. The official policy of communist parties is generally atheistic.