Modern communism is based on Marx’s theory of class warfare, in which the workers revolt against the capitalists and forcibly take control of private property. There’s none of this class warfare nonsense in the early church, nor is private property treated as immoral. Plus, the state is nowhere in sight. No government is confiscating property and collectivising industry. No one is being coerced. The church in Jerusalem was just that  -the church, not the state. Sharing was voluntary, not compulsory.