It's plain obvious to anyone who keeps their eyes and ears open that social media and the web/internet are being used to try to bend and warp reality for anyone gullible enough to believe it. And that means enough people to effect an election. This is not just a Russia thing, it's coming from any number of sources, some of them close to home with ordinary individuals being motivated to propagate the BS.
Democracy has not caught up and so is in a worse state for it.