I don't know the ins and outs of this situation on Poland, but one thing did jump out at me, which I would vehemently oppose if I lived there too (and makes a bit more sense of Brexit): that the EU has any right or should have any right to judge and actually punish a nation state over what it does with its judicial and political system.  This is why more people are becoming Euro-sceptics.  The economic union is a great idea; but unelected bureaucrats telling what elected governments are to do is another story.