I don't honestly think it's been like this for thirty years....
Beyond that, though, this is why you may not have heard that much of that recently:
This election result has emboldened those on the left who have felt that way. (And I truly do feel that way). My voting record for presidents (including primaries) is Obama, Obama, Obama, Sanders, Clinton, and if I said the above statement from Seyta at my old work (in Silicon Valley), I might legitimately have been fired. (I say that because I saw people fired for semi-similar things.) I would definitely have been anathematized and ostracized.
I got into a heated argument on election night because I wouldn't condemn the majority of Trump supporters in the midwest and conservatives in general as misogynists, racists, and bigots, among a group with a median education level of a doctorate.
For the past 10 years, I felt quite sorry for my center-right friends, when many of the elected officials of the Republican party had swung so far right that they'd basically been abandoned. While the left hasn't swung so far politically, culturally we may have swung even further, and I'm not sure what can correct it.
Also, the worst Trump supporters do behave awfully; that wasn't a mistake on Seyta's part. They don't have much cultural traction (at least, that I run into), but they definitely exist. You can't (rightfully) condemn our fringe and then not do the same to yours.