The now-missing account, which posted under the name Docnetyoutube, has a documented history of promoting fake stories. But even with his profile gone, the seeds of the lie had already been sown and spread across the conspiracy ecosystem, driven by right-wing activists and self-styled conservative journalists.
As someone who left Fundamentalist Christianity, it is exhausting. Your paradigm is constantly “under attack,” because reality has this way of not giving a fuck about your paradigm. And as long as people are generally trying their best to exist within and discover/communicate that reality, the hand of some nebulous, ever-present enemy will always be against you.
It’s fortunate for them that they’re able to tamp down the cognitive dissonance, or they’d likely stress themselves to an early heart attack.