Yesterday, I talked (online) with someone who I told that I'm a communist, and using these exact words, they refer to me as a "liberal" later on when I said I don't support Biden:
"I didn't know there were liberals who don't support Biden."
...even though I literally told this person (who was definitely a chud) that I'm a communist.
For sure, but it's not even just chuds ime, it's the majority of the US population that thinks the "further left" something or someone is, the more "liberal" it is. Even many liberals think this.
Similar to Angel's story, a while back I told someone (an acquaintance I met irl) that I considered myself a communist and their response to me was:
"I'm pretty liberal myself, but communism is too liberal even for me."
There were several other people present and none of them thought this was a strange thing to say.
When the Soviets sent the dog Laika into space I'm pretty sure the dog understood astrophysics better than your average liberal understands their own ideology.
You'll have identical luck asking them to find a stick with only one end.