Save all the emails and threads. Print them out when no one is around, for your own protection and others’, and take them home. Carry out his requests regardless of whether he remembers them, and document both the request and your response. Otherwise, ignore or nod pleasantly but noncommittally. Do not mention. Have no opinion. Do not engage. You can’t change him, you can only change your reaction to him. Nor can you control who he BCC’s on his emails. The guy will self-destruct.
Dang, you’re good! I want you for a coworker.
Good wisdom.