It will not be hard then for you to give examples of things people believe that aren’t true or for you to demonstrate how a belief in God The son fits in with that.
Dreams, or perhaps being unreasonably frightened due to misinterpretation of surroundings but where there is no threat (such as when it is dark).
in other words, what delusions are you comparing it with?
You do like loaded terms, and since the term 'delusion' can relate to mental illness I'd say that 'unjustified false belief' better fits what we are discussing (since I'm assuming that neither of us are qualified psychiatrists).
So I'd say that the feeling you've had a personal encounter of some sort, or a vision, of someone who has been dead for around 2,000 years would be an 'unjustified false belief': I accept that someone may
feel this has happened to them but I doubt that there belief is true unless they can validate in terms independent of themselves.