Dolphins are evil, and I have proof. 

1.

The dolphins have been attacking us for years from the shadows, Jack the Ripper, the StoneMan and the Zodiac Killer, they were all serial killers that were never caught.

The reason? They were dolphins. after each murder the would go into a nearby body of water and turn on there cloaking devices to evade police.

2.

When Mount Rushmore was first discovered, the British Empire had set up a town nearby. When the battle of 1812 started, it wasn't between the British and Americans, it was between the British and dolphins. during the war the town near Mount Rushmore was massacred by the dolphins and carved there leader into the mountain. Mount Rushmore was a cover up.

3. Lee Harvey Oswald assassinated JFK, as we all know. but what the government didn't tell you is that dolphins were involved. however it is unclear if JFK was working with the dolphins to destroy America and Oswald killed him to save his country or if Oswald was working with the dolphins to stop JFK from starting a war with the dolphins.