Just how long do you believe the SS Agents putzed around inside that hallway over the JFK casket/body with Jackie standing there? These SS Agents that have just Failed to protect the POTUS are not to be confused with Diplomats.
I suggest that you read Kenneth O'Donnell's testimony if you want to know how, why, and when the decision to take the body back to Washington DC occurred. Here are a few excerpts:
First, O'Donnell believed that LBJ wanted him in charge:
Mr. SPECTER. Did Vice President Johnson look to you in any way for a recommendation on his subsequent plans in terms of your being then in charge of the presidential party?
Mr. O'DONNELL. It was my impression that he did, that he, with the President gone that he felt I was--had to assume a position of responsibility, both with regard to Mrs. Kennedy and as to himself. He asked me, as I recall--he asked me for my advice as to his departure and used the words, "I am in your hands now," at some point in the conversation.
But I did get the impression that he wanted official--that isn't the proper word--but that his movements should be approved by all concerned.Next, O'Donnell found out Jackie's intentions:
Mr. O'DONNELL. ...I then went back to Mrs. Kennedy, who was in a very understandably distraught condition. It was my opinion--I tried to in some way imply that she might leave and come with us, at least to get her out of that room. She was covered with blood.
Mr. SPECTER. Which room was she in then?
Mr. O'DONNELL. She was in the same room. She had not moved. She was sitting near the door.
Mr. SPECTER. That is the room where the President was treated by the Dallas doctors?
Mr. O'DONNELL. Yes; there is a little corridor. There were swinging doors. He was inside the swing door. She was not in the presence of the body.
Mr. SPECTER. What was her response to you?
Mr. O'DONNELL. Her response to me was she would not leave her husband's body. At that point, I realized that she would not. The doctor had continually attempted to get her to take some form of sedation. And she had consistently refused, and told me she would not take anything, that she was going to stay with her husband. I realized that she was going to stay with her husband, no matter what anybody did, and there was no possible way of in any way getting her to leave. And so, therefore, the only alternative I could see was that we move the President. It is an assumption I probably would have arrived at anyway, but I arrived at it in this manner.O'Donnell describes well the process of his decision making. It appears to me that the decision wasn't made by a bunch of pissed-off SS agents. It was made by a good friend and adviser of the Kennedys who was very much a diplomatic person.