A common hand gesture that a 4chan trolling campaign claimed in 2017 had been appropriated as a symbol meaning "white power." Used by many on the right--not just extremists--for the purpose of trolling liberals, the symbol eventually came to be used by actual white supremacists as well. Caution must be used in evaluating instances of this symbol's use.
...[usage dates] to at least as early as 17th century Great Britain, it most commonly signals understanding, consent, approval or well-being. Since the early 1800s, the gesture increasingly became associated with the word “okay” and its abbreviation “ok.” The gesture is also important in the Hindu and Buddhist worlds, as well as in yoga, where it is known as mudra or "vitarka mudra", a symbol of inner perfection. The "okay" hand gesture also forms part of the basis for a number of words or concepts in American Sign Language. It appears in many other contexts as well.
You're an idiot if you believe the fake news that the OK emoji and hand symbol is a sign of fascism and white supremacy. An utter idiot. 👌