because they had bought into fake news and made up points. I think this is the impact of the social media
In my own personal analysis of this election, this is the crux. I think you've identified the key message of the entire election.
Donald Trump got approximately 30% of registered voters to support him. That's less than Clinton got, and about the same number of total votes that McCain and Romney each got, despite 50 million voters being added to the rolls since 2008.
Trump didn't grow the big tent. He didn't attract any new voters, and he didn't appeal to a majority of Americans. What he DID do was make sure that Clinton got way fewer votes than Obama did.
I think the story of this election isn't that Trump got more support than Clinton did (because be didn't) but that Clinton got less support than Obama did. The republican vote total didn't change, but the democratic vote total shrank.
Why did it shrink? It might have something to do with the end of the voters rights act or the passage of Citizens United, but those are probably smaller contributors. It's probably partly due to her being a less charismatic candidate than Obama, but even that isn't the key. I think the key is the brutally effective destruction of Clinton as a person by the alternative media.
Even on this forum, people keep telling me how Clinton had to be stopped. She's supposedly a criminal mastermind and a literal traitor to her country, despite never having been even charged with a crime or settled a lawsuit (unlike Trump), she's morally bereft (unlike the man who cheated on all of his wives), she's too sickly and old (trump is older), her foundation is corrupt (despite squeaky clean open books, unlike the trump foundation). All of these lies came from alternative media sources, and they were effective at suppressing democratic voter turnout in a few key states. They didn't have to sway a majority of the nation, just a few folks in enough states to secure an electoral victory.
Alternative news sources lied to enough people (emails, health, foundation,etc), in a few key places, to suppress democratic voter turnout. They didn't bring in any new R voters, they didn't have to convince anyone to change parties, they just had to make people unhappy with Clinton as a person, even though the majority still supported her policies. They effectively used social media to do it.
Most of the country still voted for Clinton. Trump still gets to be president, because republicans selectively depressed voter turnout with character assassination.
It's a theory, anyway.