Citations:👌

Etymology
Use to signal support for white supremacy began among users of the imageboard, due to the widely-known innocuous sense, as part of a trolling campaign designed to provoke media backlash and thereby enable the ridicule of anyone pointing out its racial meaning. The gesture and symbol came to be genuinely used by white supremacists.

Usage notes

 * Because use in reference to white supremacy was originally nominally trolling, this origin is often used to discredit reports of it being used for this purpose. However, the gesture and symbol are also actually used by white supremacists.