The left used to be more individualist in the U.S. (circa 90s most definitely) but it developed a toxic groupthink as it came to dominate pop culture and media in the 00s and 10s, and began to leverage that to employ censorship, deplatforming, doxxing, etc and it became incredibly dogmatic and if anyone diverged from a particular narrative (ie skeptical covid came from wet market), they would be ridiculed, shouted down, laughed off, shamed, kicked off social media platforms, ostracized, etc which is cult like behavior.

The left of the 90s would have never stood for that. They were the die hards for free speech then. Something shifted.

Yeah, the left of the 90s would never excommunicate anyone for being completely certain Iraq had weapons of mass destruction, and that climate change was a hoax, and the moon was made of cheese, and bringing these things up at every opportunity, because the left of the 90s believed in free speech.