The racism in Dallas and the whole South at the time was massive, it was a powder keg, with bombings etc, this was number one motive as was the fact that J.F.K was a Catholic and this stood to ruin the US UK special relationship and and most importantly a new foreign policy direction.
If Milteers prediction could have been presented, along with the possibility that another firing point was available, to still carry the same line of fire., and with Oswald himself put into the witness box, to tell us exactly where he was for the shooting, he would have been acquitted.
Social circumstances in Dallas (circa 1963) is not evidence of Lee Harvey Oswald being innocent of shooting John F. Kennedy.
Milteer's prediction [it's in the works] has nothing to do with Dallas. This is too vague and therefore immaterial.
Oswald in the witness box (at his trial)? Very funny!!!