It might be true butit is not as simple as it is. Polish ignorance came from istitutionalised lack of knowledge, cognitive tools and informational black out. IT builds a very specific perception of reality where UN sponsored secual education is used to prepare underage children to sex change and rape by the communo-liberals from EU is not a schizophrenic rant but holy and real truth and de facto a reality.You're writing about ignorant people. I write about people who like their culture and customs, who want to develop them, not lose them. There's nothing ignorant about that, it's the basis of a healthy society.
This is also areality most of the people in Poland supporting PiS and eurosceptics belive, as hard as it may be, it is truth. Fact that without EU funds we would be another Ukraine or Albania is not even raised and paradoxically no one notices that two decades of billions of Euros actually build all these schools, bridges, roads and financed education. The fear of cultural amalgamat or other such things were always on the sideways, just like delucional religious radicals. What have changed the equation was Smoleńsk Catastrophe which is the begining of mass creation of soceity wide anti governemntal then and nationalistic movement centered around conspiracy theories and skillfull manipulation and incident instigation (vide Cross Protests for example).
After years of eroding national unity PiS won on the wave of the catholic nationalism and literal counter culture towards EU and literal antimodernism, which would not be possible if not for years invested into dividing the nation and using social/cultural/strata faultlines. In the end their rise to power looks like more a staged coup rather than electorial campaing. If not for Smoleńsk, most likely PiS and they would not surge into the power, at least not till 2019 parliamentary elections, becouse simply they would not have no meaningful political ammunition, Crimea and then brewing humanitarian crisis in North Africa might be not sufficiently polarisng. Also the political scen would be much more different.
Also of note remember that contrary to what "concerned" about cultural integration in Poland are saying they after closer inspection turn out that they have no idea about what Polsih culture actually means nor even realise their real roots instead believing sanitised verision of de facto a war propaganda, from we Poles never actually have oppurtunity to really get out, and every time we are trying to do that, which there is literal screech from "concerned" people, who actually are nothing else that barinwashed propaganda tubes for their own selfinterest which is threatened ie. loss of power coming from information starved narrow minded population.
That is how real division of power and influence building works in Polish Republic. It has as much real connection with real trade as micro ultrafast transactions of the stock market.