"Stepan Bandera: The Life and Afterlife of a Ukrainian Nationalist" is a great mainstream source on all that. The author is also a liberal

In early 1943, Himmler ordered the establishment of a Waffen-SS Galizien division, made up of Ukrainian soldiers, but forbade it to be called Ukrainian. In a speech on 16 May 1944, Himmler claimed that he had called it Galician “according to the name of your beautiful homeland.” He also made comments such as “I know if I ordered the Division to exterminate the Poles in this area or that area, I would be a very popular man.”

The soldiers of the Waffen-SS Galizien took the oath: “I swear by God this holy oath, that in the struggle against Bolshevism, I will give absolute obedience to the Commander-in-Chief of the German Armed Forces, Adolf Hitler, and if it be his will, I will always be prepared as a fearless soldier, to lay down my life for this oath.”

Vasyl’ Veryha, a veteran of this division, mentioned in his memoirs that Ukrainian policemen greeted the Waffen-SS Galizien soldiers with “Heil Hitler!” and that the response was “Glory to Ukraine!” (Slava Ukraїni!).

According to testimony by UPA partisans, the SS police regiment was supported by UPA freedom fighters when they exterminated the Polish village population. In Slovakia, where the Waffen-SS Galizien helped the Germans to suppress the Slovak National Uprising, individuals from the Waffen-SS Galizien may have committed crimes against civilians as well.