The cartoon’s caption reads:
“Did you know that there’s a name for the well-meaning people who, in a misguided attempt to be tolerant and respectful, promote the authoritarian and censorious ambitions of the woke movement?
A pun on the word sleepwalkers.
The term useful idiot refers to naive followers of a political cause who aren’t fully aware of the harmful nature of the cause. It is often associated with the followers of communism the mid twentieth century.