I think you're right about social media. All of us will be seeing complete lies about all the political parties on a regular basis, and the truth gets lost in the noise.
Say what you like about the much hated "MSM", but the conspiracy theorists, grifters, opportunists, and outright liars who help corral more and more people into echo chambers, are much, much worse.
You used to see it on the far left and far right, where groups splinter, and would have a vitriolic hate of people with only slightly different views to their own. Now, it's so easy to find your "tribe" online, that it's spreading much wider across the political spectrum.
I think the nearly 50% of young people who said that they'd rather the internet didn't exist, have the right idea.