“It ain’t what you don’t know, it’s what you do know that ain’t so.” Most Americans “know” that Iran is the “World’s Leading Sponsor of Terrorism.” That ain’t so. Veteran Intelligence Professionals for Sanity tried to educate Donald Trump on that in 2017:
https://consortiumnews.com/2017/12/21/intel-vets-tell-trump-iran-is-not-top-terror-sponsor/