Just to make it clear, Bandera and his followers were mass-murdering bastards of the first water and were directly responsible for the killing of thousands of Jews. Undeniable. They also killed huge numbers of Poles, men, women and children. (Also, incidentally, thousands of German soldiers). But the Russian army also killed tens of thousands of Poles, immediately after they first invaded Poland in alliance with Germany and then again later when they reconquered Poland at the end of the war. The Russian army also took part in the forced deportations of so many minority nationalities during and at the end of WW2. Ethnic Germans, Crimean Tatars, Greeks, Crimean Italians, Bulgarians, Muslim Armenians, Finns, Chechens, Ingush, Kalmyk Mongols, Balkars, Karachays, Meshketian Turks, Laz and others. As well as large numbers of Latvians, Estonians, Lithuanians and Ukrainians. As you probably know these deportations resulted in huge loss of life from extrajudicial or punishment killings, through to deaths from hunger, thirst, malnutrition and medical neglect. Then there was the mass rape of German (and Polish women) at the end of the war.
So I'm not supporting Ukrainian nationalist atrocities, but let's not forget what the Russians did. (Let's not forget their domestic mass murder before WW2 either). The past atrocities of one group do not excuse the past or current atrocities of another.