Do you realize that the very fact that Oswald could not have made the bag proves that he didn't kill Kennedy?
I don't have the slightest idea how that was done. I wouldn't know how to do it. I can't believe that Oswald would have known how to do it. And I can't even believe that he would have tried to do something so complicated and elaborate when, presumably, he was sneaking this in when nobody was looking.
So, the killers really blew it by making such an excellent, professional-looking bag, which Oswald never could have or would have done in a million years.
THE BAG IS A SMOKING GUN!