Didn't Jones break into the public consciousness when he teamed up with Rosie O'Donnell in saying that 9/11 was a government set-up? The original "9/11 Truther"?
I was told that one of Jones' conspiracy theories turned out to be true or close to the truth. But he hasn't been correct since.
Still he does have a following and ordunarily, I wouldn't care about his crazy ideas and his equally crazy hardcover followers. But some of his whacko ideas have caused harm. In fact, he's being sued by the family of one of the Sandy Hook victims for saying the shooting was a false flag operation, the victims are/were actors, no one died, but rather, they are alive and living in FEMA camps or something. These familes have been hounded by some of Jones' followers, demanding to know where their loved ones really are and being threatened by these loons.
And of course, Jones was at least partially responsible for spreading around that lunatic theory that Rafael Cruz conspired with Lee Harvey Oswald to kill JFK, possibly helping to sink Ted Cruz's presidential campaign.
I don't like Jones and Trump's willing association with him makes me like Trump even less than I already do.