Let me be a little more specific: who killed ROBERT Kennedy? What was his religion and nationality, and what was his motivation?
Are you asking about specific Kennedys? Because if you're just wondering about Kennedys in general, I'd have to guess Mr. Jack Daniels probably had a hand in more than his fair share of their deaths.
Not sure either of those is what Mick & Keef had in mind, but I do love ThreSources.