From God in the Dock:
Question 15: In the past the Church used various kinds of compulsion in attempts to force a particular brand of Christianity on the community. Given sufficient power, is there not a danger of this sort of thing happening again?
Lewis: Yes, I hear nasty rumors coming from Spain. Persecution is a temptation to which all men are exposed. I had a postcard signed 'M.D.' saying that anyone who expressed and published his belief in the Virgin Birth should be stripped and flogged. That shows you how easily persecution of Christians by the non-Christians might come back. Of course, they wouldn't call it Persecution: they'd call it 'Compulsory re-education of the ideologically unfit,' or something like that. But, of course, I have to admit that Christians themselves have been persecutors in the past. It was worse of them, because they ought to have known better: they weren't worse in any other way. I detest every kind of religious compulsion: only the other day I was writing an angry letter to The Spectator about Church Parades in the Home Guard!
The best part of this is Lewis's remark that Christians should have known better than to be persecutors. It is a bit hard to understand how a religion whose central narrative is the Crucifixion could so often have emulated Caiaphas.