Because of modern communism and its complete failure, people have forgotten that the original Orthodox Christian Church was in fact, communist.
Prove it.
It is true that some Christians held communal property during the first few decades after the Resurrection. But, this did not include every Christian. Furthermore the property was held communally to make the propagation of the Gospel easier- it was a period of intense missionary activity and these Christians did not wish to be distracted by their own material goods. You did not have Christians living in stationary communes.
BTW: When you say Orthodox Christian do you mean simply 1st century Christians or do you mean the Eastern Orthodox Church- which did not come into existence until around 1000 AD?