You're right when you say there's begun to be some hints of that in America, I suppose, but I would say (and would assert that most Americans would agree if they lived here for a while) that America's microscopic dose of that mentality is many, many orders of magnitude lower than what is considered normal here. Here, defying "the prevailing view" is not just rude, it's not just a crime... it's heresy. Questioning the word of the Party State is in their minds what a Luciferian Altar in the middle of Canterbury Cathedral would be in the mind of an Episcopalian.
I find it hard to believe that America will reach that point. Not because there's no authorities that want it, but simply because Americans are, by our very nature, too rebellious and disobedient to comply with this level of Thought-policing. We couldn't do it even if we somehow wanted to.
That's not to say we don't need to be vigilant, but we are not in as much danger as many people think.