Rebel forces in eastern Ukraine have never been associated with the neo-Nazis.
Recurring disinformation narrative painting Russia and its proxies in east Ukraine as sworn enemies of fascism.
Both the so-called "rebels" occupying swathes of sovereign Ukrainian territory and their local precursors have numerous links to neo-Nazi and other far-right movements.
Pavel Gubarev, the first "people's governor" of the "Donetsk people's republic," is a former member of the neo-Nazi Russian National Unity.
See here for additional debunking by Polygraph.info, particularly the section titled "The neo-Nazis amidst Russian rebel ranks."