Interestingly I found out that those extreme flag-flying nationalists are usually the first ones to arrange themselves with somthing new, if they see a personal need to change the lines. While most of the silent ones would fight to their last drop of blood to defend their own idea of their nation, those who are addicted to profile themselves through overstated gestures simply swap the flags quietly.
I never said that the Poles (as a nation) would do so. Nevertheless I am sure that most of your politicians (including those who join this funny demonstration of nationalism in your country) would wave any flag if it would be suitable to their personal career.
Just take your heroic leaders. If they do not want any change of the current state of Poland they are free to leave the European union. We all know that they would love to do so, but without the alms of greater Europe their economy will not work anymore. Poland needs espechially Germany and its large markets to be sucessfull in the long term. Therefore the funny twins prostitute themselves to sign treaties they dismiss, just because their voters would kill them in case of a refusal. Prosperity and wealth seem to be more important than national pride in contemporary political Poland.
This big national hullabaloo is not very impressive from the outside. It might be suitable as a cheap propaganda show to dazzle some idiots in Poland but in real life it are not the flags that count. Personally I think it would be better for the Polish leadership not to fall into political prostitution and to leave a club they do not want to be in. It might be not better for the Polish people (who need the advantages of the EU badly), but it would be honest.
Think about it.