"classical" liberals were only sane because they operated under the constraints of a highly conservative society exiting out of the 50s into the 60s and 70s. they fought for Free Speech because when you're the minority then freedom of speech is required to make any progress.
today, liberals won the culture war, society tipped from conservative to liberal in the 90s and "liberals" true colors were exposed to the air. now they are against free speech because it can be used against their causes. The only side that is pro-free speech is the underdog but once you're in control that shit hasta go away. And it turns out "liberals" are just as authoritarian as any other political ideology when in power, they have the power and they'll use it to retain that power
gotta erase the notion of 60s libs as being "true" liberals, it was a temporary product of the times and the restraints they found themselves under. the modern left is *the* left, authoritarian and regressive.