John 7:20

‘The crowds answered, ‘you have a demon. Who is seeking to kill you?'

This suggestion upset the people who were listening. They may well have been standing round in the Temple area, listening to various teachers. Note that it was ‘the people' who said this, some of whom were not aware of the dark overtones that were in the air. They thought that He was exaggerating. But the Judaisers knew exactly what He meant. They were uncomfortably aware that He was right. ‘You have a demon' was probably the equivalent of our use of ‘you're mad', not intended to be taken literally, but as a dismissive comment.