As for Executive orders about Viet Nam, that's a story I haven't heard before.
Nothing in the assassination adds up; sure, I can respect people making the lone gun nut theory and others that are counter.
I found this story last weekend; it sounds far out, but it is after all; a Dallas Times-Herald photographer who was there when Ruby shot Oswald. He says there was “no blood.” http://theuniversalseduction.com/articles/photographer-who-snapped-infamous-oswald-photo-said-no-blood-at-crime-scene (just went to find the story, I have no idea what this website is about). Everything about the assassination has some odd twist or turn to it. That’s why it is suspicious. I can respect those saying “one gun man” but what if, vs. the Warren Commission; they were trying a man in a court of law with 12 jurors? I can’t buy the magic bullet shot under those circumstances.