It was John, and he said it in reference to teenagers in Britain. The quote came out in a UK interview months before Datebook published it in America and it was no big deal. He said it as if many things were more popular than Jesus, and he was probably right. PLEASE NOTE: That doesn't mean "better" or "greater", just more popular.
BTW, I don't think the smashing and burning happened in more than just a few cities(mostly in the south). In fact, it may have been limited to Birmingham where a couple of DJs made a stunt out of the whole thing.