This phrasing surprised me, too. Bandera certainly has a mixed legacy. The truth of the matter is that Stalin's brutality and evil was so bad that he forced western Ukrainian nationalists to collaborate with Nazi Germany (which of course was also brutal and evil, but also offered a semblance of hope for Ukrainians, like other ethnic minorities and partisans who were placed against gargantuan rocks and hard places during the height of the horrors of the 20th century, and perhaps world history).