Green Day sucks. Their music is manufactured to become whatever is popular at the time. In the early and mid nineties, they resembled grunge and pop. Now that stupid kids are fond of "punk" (which none of the music they like actually is), Green Day has seen and taken an opportunity to make MORE money by whoring themselves out to a new audience. They have never been original, and have never been "good". Anyone who thinks they are a talented band is fooling themselves.
Why a definition for "Green Day 'controversy'" exists is beyond me, but whoever defined it is stupid and inane.