Thinking of every side as equivalent is to overly simplify history. Many older Germans were scared as fuck by the fascist’s brutal tactics taking over the country. They spent a great deal of effort indoctrinating young people, but used fear to control older age ranges. The country was seriously unpleasant even if you fit their ideals.

It’s not that one side was some paragon of virtue and the other pure evil. Stalin wasn’t a nice fella just because he was fighting Nazi. However, there was significant differences between American interment camps and their German or Japanese equivalents. Given a choice people would definitely chose being in a British POW camp vs a Soviet POW camp.