Courtesy The Wall Street Journal Jon S. Corzine, the former New Jersey governor who revved up risky trading as chief executive at MF Global Holdings Ltd., deserves much of the blame for the firm’s 2011 demise, according to a bankruptcy trustee’s report released Thursday. The report mentioned Mr. Corzine’s name a total of 284 times—an average of more than once per page—and concluded that he and his management team engaged in “negligent conduct.” The 174-page document, filed shortly after midnight Thursday in a federal bankruptcy court by former Federal Bureau of Investigation chief Louis J. Freeh, represents the most thorough…