you are making a big leap here. You are, if I follow, assuming these people were already present and protecting him. Am I misunderstanding? As far as I can see, if anyone travels in time, they will change the timeline, simply by existing in another timeline. It may be possible to observe a previous timeline, but even the act of observation can change the outcome. Of course, it is possible that these changed timelines already exist on alternate time paths. Perhaps possible is the wrong word. Inevitable..