It was political, here’s Jarvis’s explanation (from an interview on TFI Friday!) shortly after:
"I was just sat there and watching it and feeling a bit ill, 'cause he’s there doing his Jesus act.
“And I could kind of see - It seemed to me there was a lot of other people who kind of found it distasteful as well, and I just thought: ‘The stage is there, I’m here and you can actually just do something about it and say this is a load of rubbish if you wanted.’”