I think socialism and Marxism are fundamentally un-Christian, and it has little to do with possessions or income. God recognizes man as a free moral agent, free to accept God’s lordship over his life, and free to reject him.
Socialism and Marxism do NOT recognize man as a free moral agent. Any time any person stands in the way of what the State wants, that person’s rights, property and everything else is swept aside in favor of the state’s wishes.
That being true, I view the ideologies of socialism, Marxism, etc., as being utterly and hopelessly evil.
All the isms seek to replace God as the wee small voice in your head.