>A complete liberal from not that long ago would now be deemed a conservative by the DNC.

You say this like it isn't inherent to the nature of liberalism versus conservatism. A liberal of a prior generation is almost always conservative compared to liberals of the current generation. It just feels different this time because you're actually witnessing it change in real time rather than learning about it from history.

But in this case we're rather going in quite the opposite direction! For instance broad opposition to free speech has no place in any sort of formulation of liberalism, and so you find yourself in a scenario where a certain brand of liberal today would hold values deemed quite conservative, even by the standards of the past.

But this is also not particularly unprecedented. In the early 20th century the Republican and Democrat parties largely swapped roles. There was no formal agreement or acknowledgement of such. It happened quite organically, spurred along by decades of relatively significant events. I think we're seeing the outlines of such happening again, in much the same way.

When one debates aforementioned 'certain brand' types today, it often feels like a blast to the past. They share many of the characteristics of the die hard conservatives of times past - self assuredness bordering on divine authority, seemingly blissful ignorance of their numerous self-declared 'enemies', that trademark rabid intolerance, and more. The main thing that's changed is the dogma of choice.