"Thou shalt not steal" is an affirmation of property rights, which socialism denies, iirc.
That and the 10th Commandment.
I was going to respond in kind...thank you for completing the task for me.
The single biggest argument against socialism in Scripture is that Jesus Christ, in His time here on earth, never ordered the government to do anything. His teachings on compassion, charity, love of fellow human beings, etc. are all rooted in the individual.
It's also important to keep in mind that He lived in a place and time where a totalitarian, often ruthless and brutal, government was the norm.