I find that anti-comunist sentiments in Poland, Ukraine, and some other formerly soviet countries usually refer to the soviet state, not communism as such. It is actually anti-soviet and anti-tankie.
Soviet occupation left very bitter memories, and poisoned any potential for communist progressivism in this part of the world.
This should be considered while criticising anti-communism.
Also, good to read a well-thought comment! It is an interesting question when a radical position is justified. Normally, I would radically appeal for nuanced and balanced discussion and progress within liberal institutions. But sometimes this progress is slow or near impossible.