Is what Bill Cooper said, evidence that 9/11 was a complete set up?

yes bill cooper nailed years ago, an he got murdered for it, many have said this an all were mysteriously murdered, but only 3 are allowed to talk now alex jones, david ike an jesse ventura, every one else who publicly says what these 3 say are murdered. but these 3 arent, WHY? why are these 3 allowed to speak an all others are neutralized. just saying thats all