Oren Segal, director of the ADL’s Center on Extremism, told NPR that for years on fringe online message boards such as 4chan and 8chan, the “OK” sign has been deployed in memes and other images promoting hate. Given the number of white supremacists who have adopted it, he said it can now carry a nefarious message.
What’s wrong with the OK sign?
This might give some info.