obsessination
When you're so obsessed with a real-life assassination you think it's a conspiracy. You blame everything on the same people and think they're behind every single death.
My uncle thinks the JFK assassination was a conspiracy. He says 'They killed him because he knew too much. I'm gonna kill them if they come after me.'
My mom is obsessed with the JFK assassination. She says 'He was the best president and they killed him because he didn't like their plans.'
My brother thinks the JFK assassination was a conspiracy. He says 'If they killed him, they'll kill me if I don't believe them.'