I want to punch him whenever I hear his British "Dah-veeeeed". I know it's better than the American "David", but I still want to punch him.

Did you check the program excerpts going with the analysis of the Marat painting on the site? You could read parts from the program, or from an interview, or from his books. Most of it being a bunch of nonsense. But this one part may convince you even further: "For Marat and Robespierre there could never be enough guillotine heads to feel safe." ...*tries to cold down the internal boiling*