In the USA there are plenty of people who have the reaction "PC bad, fuck PC." Which I understand and in some cases share, though in other cases I think it's taken to a retarded extreme (ooh I said retarded!)
In Europe (with the possible exception of Germany and the aforementioned swastika) I don't have the impression PC itself ever came to a point that it was something to backlash against as a phenomenon in itself. But to interpret that as meaning there's an enligtened, post-racial, post-nationalistic society that has matured beyond the need to consider these things, is just completely wrong.
I like this poster a lot, but I think in playing loose with something that should be handled with great care, it fails.