he was a brilliant idiot
Was Bobby Fischer brilliant? Or an idiot....
The pilot of the Enola Gay was good at taking orders and equally good at having no conscience whatsoever.
Just about anyone is good at summat and dire at summat else.
darvin he wasnt a genius he stole the whole idea of evolution from a book that he was reading written by a guy who invented the geological colum

darvin he wasnt a genius he stole the whole idea of evolution from a book that he was reading written by a guy who invented the geological colum
Darwin didn't "steal" the idea of evolution. He never claimed it to be an original idea of his. In fact, evolution was a pretty widespread concept by Darwin's time. What Darwin did was expand upon it (that's kinda how science works: people build and expand upon the work of others).
I heard Bobby Fischer once farted so loud during a tournament game he blew out his opponents' ear drums.

het is toch bekent dat hoog IQ dicht bij waanzin ligt / t is known that high IQ is close to madness

If he had been an idiot or a moron, he could not even have begun to play chess.
Not necessarily. There have been plenty of people who were brilliant in one particular area yet idiotic in nearly everything else.

it doesn't get much lower than mocking the dead, so I'd consider him no worse than chess.com trolls.
Brilliant, or insane?
Can't he be both?