But Merkel's Folly has woken up a lot of people who don't like having such an erratic and irrational person in charge of Germany (and thinking that other countries should just blindly follow her emotional decisions). She was basically telling Hungary and Austria how to manage their borders (though the media seemed to .... not want to make that especially clear).
The thing is that it seems to be a pattern for wildly successful CDU chancellors to make such stupid mistakes. Adenauer, Kohl and now Merkel all made that single, career-defining mistake that they became known for. But it seems that she didn't consult almost anyone before announcing that Germany was open - the CSU are furious with her, the Lander are furious and plenty of other EU countries are also furious. I don't think it's a coincidence that she's gone very, very quiet recently.
This time an unaccountable decision by a German leader probably won't affect Poland very much..... but more thinking people are now thinking 'what about next time?'
They are, but I think it's also worth remembering that Poland is growing in confidence to reject such things. It doesn't seem likely that Poland will take any Muslims at all, and I don't see any evidence that the EU is able to convince Poland to do so.
My gut feeling is that Germany (to try and save face) will end up paying Poland and the others to take the refugees.