I agree. Years ago I went to a training class in Richardson and one afternoon I went to see Dealey Plaza. I was very shocked to see how close up and compact the whole scenario actually was. Oswald could have popped a mite off of a flea with a peashooter. I stood there on the sidewalk and it looked like I could reach out and touch the window glass on the sixth floor.
Now zoom out to the sniper in Las Vegas who fired from the thirty second floor.
Even the controversy of Jack Ruby is not at all difficult to understand. He had policemen in his businesses constantly and they were his friends. He knew that he would be idolized and lauded by his friends and the nation if he killed the evil b_st_rd that murdered our President.
Oswald's motivation was textbook human nature too. He was enamored with Communism but was humiliated and rejected by the Soviets, so in a classic "I'll show them move" he killed the leader of the Free World Capitalists.
Showed what one motivated Marine and his rifle can do.