According to this article:

The K-Pop Community Is Using This Hashtag Against White Supremacists on Twitter Right Now

"QAnon (who, by the way, are white supremacist, horrible pieces of garbage humans) think people like Barack Obama, Hillary Clinton, and some celebs are all in on the plot against Trump and the government. This theory allegedly started out in a 4chan group by a member who claimed he had "classified documents" that proved "liberal Hollywood" and other agents are working against Trump and are part of "deep state." Basically, it's all super right-wing nonsense that can be super dangerous if spread around and actually believed."

More in the link: https://www.distractify.com/p/wwg1wga-meaning