Oswald, as was his nature had a fundamental issue with the American government. He believed the government worked against the average American; the working class. As head of the government, the POTUS was responsible. Those who knew Oswald have said over the years that he, Oswald liked and admired Kennedy on a personal level. Didn’t matter in Oswald’s damaged psyche. He wasn’t shooting JFK. He was shooting the POTUS and all that position represented in the world. Chaos. He believed guns were made to change the world.