>
the ok sign has taken on the meaning of a white power sign in certain situations.>> When done when posing with Steve Bannon it probably means white power sign.
When a no-kidding, self-admitted, non-LARPing, Stormfront-reading, Klan- or Nazi-party member says "Yeah we've been using the OK symbol for years" then I'll believe it.
But all I've ever seen about this is leftists of a certain type asserting that it's true, with some variation of "I know it's true because all my friends and thought leaders say it's true, and you can see yourself that such people as Steve Bannon use it, and people have even been fired for doing it. Definitely true. Your move, white-supremacy-denier!"
So, no. It's a conspiracy theory, in which denial of the conspiracy is yet more evidence of the conspiracy.