Not an opinion, there is a photograph with a shooter behind Zapruder, there is the Nix film that shows a gunshot with a smoke trail from the same area where a person can be seen in the Mary Moorman photo. You have Mr. Zapruder and Mr. Newman stating that they thought the gunshots came from right behind them. You have police officers in the Warren Commission stating that the shots came from that direction. You have film evidence of gun smoke floating in the same area. You have a Senator stating that he smelled gun smoke in the area.
Not my opinion, it is hard and undeniable evidence that there was a shooter from the pergola.
If you choose to be blind and ignorant to these facts, that is your choice.