Unfortunately, you’re right.
The extreme right and the extreme left are both (a) crazy and (b) anti-liberal. When I was a kid, the illiberal right was the big problem in the U.S. Now the illiberal left is the big problem. Sadly, liberals are used to fighting conservatives, and tend to be knee-jerk-edly against anything conservatives say…and also tend to knee-jerk-edly defend even extremely illiberal versions of leftism — political correctness, “social justice,” identity politics…
But liberals have more in common with moderate conservatives than they have in common with the PC / SJ / IP left. This is largely a re-run of the late ‘80s-early ’90s…though the hard left is even crazier now than it was then. Back then, the influence of PC only began to wane when it got so crazy that liberals could no longer deny that it was illiberal — and nuts. I expect the same will happen this time — and I also suspect that many liberals are starting to see the light.
Unfortunately, paleo-PC was able to do a lot of damage before liberals began to push back against it. That damage then served as a beachhead or springboard for this latest wave of madness, neo-PC. If the same pattern repeats this time, we’re going to be in even bigger trouble 15 or 20 years from now.