That comment makes zero sense. Ukrainians allied with the Nazis because of their belief Slavs were subhuman? Ridiculous. Yes there were antisemetic. Ukrainians who did terrible things. As there were Germans, Austrians, Dutch, Latvians, poles Russians etc etc etc,
The vast majority of Ukrainians who sided with the Germans was because of a belief they would allow an autonomous Ukrainian state, and so many had suffered terribly at the hands of Russians and the Soviets for decades that ANY chance to escape was welcome.
No, Ukrainians allied with the Nazis because of their hatred for the Bolsheviks. But Ukrainian support fell during the war because of the terrible (racially motivated) way the Nazis treated Ukrainians.