I’ve yet to come upon a single person who was a Hillary supporter at first but then switched to Trump upon being exposed to a bit of fake news.
Also, very few, if any, people are gullible enough to fall for obvious fake news. You disagree because that’s how the Nigerian Prince became a billionaire?
Hillary lost because she had bad pollsters who told her there was no need to go to Wisconsin, because she put half the country in a basket of deplorables, and because she was not a good campaigner. If some insidious Facebook campaign was hurting her, why didn’t her social media experts and pollsters see it at the time?
I agree the larger danger is in overreacting to an inflated threat.