It started because some germans pizza day got cancelled, but I think the real motivation is a subtle dunk on some earlier meme rotation from americans about corporations trying to placate employees with pizza.
In a nutshell, americans: we don’t want pizza, we want unions and worker’s rights! Germans: we already have unions and worker’s rights, we want pizza!
John Adams? That can’t be, that’s that little guy, that spoke to me, all those years ago, what was it? 85? That poor man they’re going to eat him alive!