If you follow conservatives on social media, you will regularly see them getting riled up about AOC. "She's a moron!" they'll cry in unison while they mock some stupid thing that she said. I've been guilty of it myself... you're not innocent either, are you? She does say some very stupid things.
The left spent the last decade calling Trump a clown... an idiot who can barely read.
They didn't just say it. Hillary's campaign had a memo about elevating him in the primary, because they were certain he'd be the easiest Republican to beat. Ann Coulter went on Bill Maher and said he could win. The whole room laughed at her.