Maybe so, but remember he's an old man. My dad is the same age and doesn't agree with anything I say. If I was famous, I can see him doing the same thing.
That's precisely why he should be ignored. "Left alone" would be a better way to put it. I'm not taking away at all from the nuttiness of what he said, but it doesn't excuse the deceitful way in which the man got the old guy to talk.