A brilliant scientist, yes, but also an unhinged lunatic. Not an unusual situation, see Cantor etc. What's curious is how many hagiographies have been written about this individual - some people seem bent on rehabilitating this figure by erasing uncomfortable history.
In any case, hero-worship of scientists is very silly. The Nobel Prize bears a lot of the blame for this - but in reality, the vast majority of fundamental scientific discoveries are the result of dozens if not hundreds of researchers working over decades. The invention of the electronic computer is a good example of this, as is the invention of the nuclear bomb, as is the discovery and characterization of DNA's role in the cell.