Why did Stalin disagree with communists?

Stalin's disagreements with other communists stemmed primarily from his belief in "Socialism in One Country," which prioritized strengthening the Soviet Union over global revolution. This contrasted with the views of many Marxists who advocated for internationalism and the spread of communism worldwide. Additionally, Stalin's authoritarian methods and focus on rapid industrialization often clashed with the more democratic and egalitarian principles held by some factions within the communist movement. His consolidation of power led to purges and repressions against those who opposed his vision, further deepening the divide within the communist party.