Since when is he answerable to them.
They can “summon” all they want and he can ignore them all he wants.
If I were him, I would not go out of concern for my safety and well being. I would not put an assassination attempt above them.
If they can kill a POTUS (JFK) and make it look like a “lone gunman” did it, they can kill Elon and make it look like a plot that originated in Europe. I hope he has the best security money can buy. He can certainly afford it.