Organization of Ukrainian Nationalists
http://en.wikipedia.org/wiki/Organization_of_Ukrainian_Nationalists
Bandera and his allies fought against a lot of different forces, sometimes brutally. War isn't pretty, particularly when an insurgent force is caught between two other powers intent on subjugating its people. Present day propagandists are trying to tar the Ukrainians of today because some Ukrainians sided with the Germans temporarily during WWII.
Funny how nobody seems upset that the French, for example, did the same thing. Would you consider the French people of today Nazis because they supported the Nazis with the full force of their government and nation in WWII? Of course not, that would be as ridiculous as your assertions about modern day Ukrainians.