However looking at his bio it doesn't look to me that he's 'too dumb'.
I didn't think so but wasn't that what YOU were saying?
IMO there are more likely other reasons for him making up stuff and spreading disinformation and lies (eg fraud, falsification, not harmonise with known physics nonsense). A bit like what it usually all boils down to with the garden-variety disinformer. Money or ideology.
Yes: Follow the money! But isn't most of the money being doled out to you alarmists?
What total arrogance to say that only sceptics can be bought.
