> He was a malignant narcissist as that term is defined[ * ]
From that page on Wikipedia:
"as a hypothetical syndrome, it would have..."
And a history full of anonymous edits, and people banned for abusing single purpose accounts.
You and your friends are not psychiatrists, however much you play one on the Internet, citing pages on Wikipedia that refer to this that do not exist by their own admission, and which I would be wholly unsurprised to learn if it's was shown that you had a notable role in its creation and/or content.