Yet another example of hiding behind the holocaust. The fact that so many people were killed has nothing to do with whether a country has the right to pass such legislation. Poland (and every other country) has the right to pass animal cruelty laws. The fact that these laws cause a problem because they conflict with rules made up in ancient times does not mean those laws are not valid. Perhaps a more valid question would be why you insist on maintaining such primitive practices.
Military police vehicle attacked by rioters overnight in ultra-Orthodox area of Ashdod (Haaretz)
from the article: Poland's parliament votes to uphold ban on kosher slaughterhouses