The only attack is a single phrase, referring to him as a "sociopathic billionaire". I don't think his status as a billionaire is questioned, so you must object to the use of the one word "sociopathic". Let's check the DSM-IV:
Antisocial personality disorder is characterized by a lack of regard for the moral or legal standards in the local culture. There is a marked inability to get along with others or abide by societal rules. Individuals with this disorder are sometimes called psychopaths or sociopaths.
Well, not exactly clear-cut, but I think a reasonable set of people, perhaps including Thiel, would agree that he has "a lack of regard for the moral or legal standards in the local culture"
Antisocial personality disorder is characterized by a lack of regard for the moral or legal standards in the local culture. There is a marked inability to get along with others or abide by societal rules. Individuals with this disorder are sometimes called psychopaths or sociopaths.
Well, not exactly clear-cut, but I think a reasonable set of people, perhaps including Thiel, would agree that he has "a lack of regard for the moral or legal standards in the local culture"