I know what you are saying - but many of the most radical views were initially held by a few whom were outspoken for it - look at plate tectonics, ice ages, bolide impact based mass extinctions.etc., Aslong as he is not trying to force the theory upon them, expressing his support for it will make no difference - I'm sure no one could claim that all of the evidence supporting it is fallacious, and that his belief in it makes him idiotic.
That is a paraphrase of a voltaire quote, yes...