To call Stepan Bandera - who was a U.S. ally in the cold war by the way - a fascist is nothing but a pro-communist smear.
The Lviv pogrom of 1941
Although in April 1941 the Bandera faction of OUN had repudiated pogroms, it was obliged to revise its stand when Reinhard Heydrich explicitly called for such “self-cleansing actions” on June 17.
At that time, OUN was coordinating its military activities with the Germans. On June 25, Yaroslav Stetsko wrote to Stepan Bandera that OUN had “formed a militia to remove the Jews” (usuvaty zhydiv). A week later, on July 1, the pogrom took place.
The head of the OUN underground, Ivan Klymiv, issued leaflets that were affixed to walls in Lviv on July 1. One of them said that revolutionary tribunals would punish enemies of the Ukrainian movement, applying “family and national responsibility for crimes against the Ukrainian State and Ukrainian Army.” Another said: “Nation! Know! Moscow, Poland, Hungarians, Jews are your enemies. Destroy them.”
At this time, OUN was setting up its own Ukrainian state, heralded as a ”Ukraine for Ukrainians.”
The head of the OUN underground, Ivan Klymiv, issued leaflets that were affixed to walls in Lviv on July 1. One of them said that revolutionary tribunals would punish enemies of the Ukrainian movement, applying “family and national responsibility for crimes against the Ukrainian State and Ukrainian Army.” Another said: “Nation! Know! Moscow, Poland, Hungarians, Jews are your enemies. Destroy them.”
https://www.kyivpost.com/opinion/op-ed/the-lviv-pogrom-of-1941-83452.html