The communists and the czar were on opposite sides of the civil war. They are mutually exclusive antonyms. To call someone a czar is to call them an anti-communist and to call someone a communist means they are anti-czar.

You see, it was the conservative counter-revolutionaries who supported the czar while the communists sought to overthrow the autocracy.

The last Russian Tsar, Nicholas II, ruled the Russian Empire until his abdication in March 1917, due in part to the strain of fighting in World War I. A short-lived Russian provisional government took power, to be overthrown in the 1917 October Revolution (N.S. November 1917) by revolutionaries led by the Bolshevik leader Vladimir Lenin.
https://secure.wikimedia.org/wikiped...lution_of_1917

There, now you're less ignorant and you can stop your idiotic 'communists/tsar' meme.