Of course there's a conspiracy here...
If NOT, then you'd have to believe...
1. in "magic" bullets that defy physics....
2. that Oswald could somehow fire a bolt action rifle faster than humanly possible.
There is NO doubt in anyone's mind (with an ounce of logic) that Oswald was only one of multiple shooters.
As for WHY JFK was killed, there's almost too many motives to even BEGIN to try and track any one of them down. The man made a pastime out of
creating an enemy daily.
He wanted to end the war, go to the gold standard, bring down the mob, eliminate the CIA...man, where do you start???