But if it has not been increasingly subjective, but harder to detect, then what you are implying, if I do not distord your point of view, is that it is okay to be stricter in policing to catch stop these sophisticated bigots.
But, doesn't being more strict mean that you'll also have more false negatives, that is people that always had "heretic" talk from the point of view of general society, without necessarily being a bigot, but are now being identified as such because the criteria are paint with a broader brush?
And then, wouldn't you agree that this is a restriction of free speech, that people on the other side are arguing to be unacceptable?