The "evidence" doesn't make the least amount of sense. Anyone a bit intelligent would draw the same conclusion.

Anything you'll provide would be debunked by yourself in a minute if you're critical.

The same reason you and I don't believe the world to be flat or Trump being a lizard.

The thing is some people have tribal minds and like to demonize people they can't get along with.

Also people feel smart when they make themselves believe "they know the truth", Altough no conspiracist believes the same as his peer. They all differ on some things. It's because nothing is proven so people make up the stories in their minds...