There are many things I can agree with in your comment, but I try to deal only with verifiable, documented facts in order to counter anyone who wants to call us all “conspiracy nuts”, not realizing of course that they themselves will believe in conspiracies when it comes to certain subjects.
For instance, I would not say he shot at General Walker because the only source we have for that is questionable. Oswald was never arrested for doing so, so it is unverifiable and would be only tangentially related to the JFK assassination even if it did happen.
Also, in regards to psychological motives, I would only look at (once again) verifiable, documented facts.
Oswald was documented as giving out pamphlets that were pro-Communist Cuba. Like you said, there is video of him doing so.
Does this mean Oswald was a Communist? On the surface it would seem that way. Also his relocation to the USSR would tend to make one believe that.
BUT, he came back to the US, with a Soviet wife, and neither seemed to have any problems getting back into the US. At the very least there should have been government eyeballs all over Oswald. The fact that he was allowed anywhere near the parade route was either a sign of gross incompetence or bad intentions.
What FORM the bad intentions might have been is the part I would investigate and try to find evidence to support or deny it.
Let's take this sentence out of your paragraph:
At the very least there should have been government eyeballs all over Oswald.
The truth is, is that there were indeed all kinds of eyeballs all over Oswlad and Marina. He did not just slip in between the cracks and show up in Dallas. They were tracked, interviewed, monitored and investigated by FBI Agent James Hosty (in addition to others including the CIA). Oswald was a known “Person of interest” from 1959-1963 and after he blew up and left a warning note at the FBI office in Dallas, he was still tracked. This is documented even though Hosty destroyed that letter.
In this case, there is a lot of destroyed evidence all over the place. The most interesting thing is that after Oswald was arrested, no notes were taken during his interrogation (or maybe they were destroyed too?) and yet, the next morning, the newspapers were flooded with headlines about him being an “accused Pro-red”. How did we get that information so quickly? Why did we, the public, immediately know that he had defected to the CCCP and that he had worked for the “Fair Play for Cuba Committee”? How & why did Jack Ruby correct a spokesman in the Dallas Police station regarding the name of the “Fair Play for Cuba Committee”???
Oswald, whether he fired a shot or not was not served due process under the law and it was a circus of a show at the Dallas Police Department until he himself was shot & killed.
There are too many unanswered (and maybe never answered, even after 2038) questions. Now, in 2016, it is pretty clear there were many cover ups. The question remains, were these cover ups trying to mask Agency malfeasance or more sinister doings?