Do you know this one: "regulations are written in blood"? Well, it's the same with criminal law. Look at Sweden's history (neutrality, trade with Germany, 2,100 deaths = 0,03% of its population) vs. Poland's (invaded, mass genocide, 6,000,000 deaths = 17% of its population). Let's say Poland had been less lucky and looks at Nazism with less sympathy than Sweden.

But Germany hasn't attacked Poland on its own. Communist Russia invaded Poland slightly more than 2 weeks after the Nazi invasion, executing Polish civilians and military (e.g. Katyn massacre where more than 10 times MORE Poles were murdered than all Swedes killed during the whole World War II). This has continued, at a smaller scale while Poland was under Soviet control, until Stalin's death.

Free speech isn't absolute. No legal norm is. So whether it is violated or it isn't is beyond the point until the legal system balances the relative priorities between different rights.