Under Jeremy Corbyn, relations between the grassroots Catholic Church and the Labour Party in their shared heartlands (they have almost exactly the same ones, and that is not a coincidence) have moved on from "You have to put up with your family, because they're your family", and back to the real warmth of old. The cooling had been well and truly because of the Iraq War, having been coming for years over New Labour's attitude to poverty and to disability. And we all know what Corbyn thought of all of that.
But even through it all, it was quite normal for Catholic church halls to be used for Labour Party meetings, on occasion without even the charging of a fee. Now, try and imagine the use of Catholic church halls for Conservative Party meetings. Or the meeting of the local Labour Party in the hall of the Church of England. Indeed, try and imagine anywhere where the Catholic church hall was the sought after venue, or even where there was one, and which had any Conservative Party that wanted to meet at all. You can't. You simply can't.
So forget, just forget, about Jacob Rees-Mogg as Prime Minister. It is never going to happen. Corbyn, on the other hand, is going to be the Prime Minister. With an even higher vote in the Catholic heartlands than he achieved this year, and that will be quite a feat.