Lennon made a comment which some religious leaders felt was derogatory towards their prophet and religion. That lead to scattered Beatle record burnings as a protest.
Lennon: "I wasn't saying whatever they're saying I was saying. I'm sorry I said it really. I never meant it to be a lousy anti-religious thing. I apologise if that will make you happy. I still don't know quite what I've done. I've tried to tell you what I did do but if you want me to apologise, if that will make you happy, then OK, I'm sorry".