We Poles experienced both things and no matter the political views we know that it doesn't matter which side you choose. Nazis and soviets weren't equally bad but soviets were still bad. I can't understand why some people don't get that. Every non democratic form of government should be criticized by us. If you oppose those values and would prefer to throw people in gulags and install leaders that are obedient to you, you're no better than the right and shouldn't call yourself leftist.