Political Correctness (PC) has a somewhat complicated relationship with tenets like liberty, freedom and the pursuit of happiness. It may not be obvious at first glance, but any advocate of PC is actually an adversary of these fundamental principles.
The founding fathers where rebels, they were all traitors to the British Crown and had they been caught in time by the british, they would all have been hanged.
PC is the very antithesis of liberty. It should be self evident that when someone else tells you what you can and cannot say, he is trying to limit your freedom. Totalitarianism is dependent on silence.
PC culture on the other hand is not without its own accomplishments either.
At the end of the day I suppose the result, as it always is, will be the outcome of the battle of balances. In Norway the government is already preparing how to handle Sweden as a failed state due to the Swedish PC culture, read about it here.
Will the majority feel more compelled to protect liberty or will it be more compelled to protect PC culture? In a way we can actually already now predict how our society will become either way. Because how the future will manifest itself is really a matter of history.