While we are on disturbing trends, and I'm seeing this from both the left and the right, but it really blew up with Obama, are hyperbole and projection.
I'm sure we've seen the hyperbole in the past few days: "half the country is racist, half the country hates women.. etc" but even on the right "Trump is our only hope, the country is doomed forever if Trump doesn't win, God ordained Trump to save us...."
For projection, we saw it with Obama as people projected all their hopes and dreams on him: "the sea levels will fall, he will pay our house note, healthcare will be free....". I've seen this so much with Trump too, people projecting their own hopes and dreams on him, even for things he never said. One example just yesterday, somone posted a rant about 'rappers in the White House' saying that Trump would ban Jay Z and people like him from the White House 'and ban a lot more things like that'. They were projecting their own hope because nothing Trump said comes even close to suggesting that and if you look at Trump's history, he is just as likely to have that type of entertainment because he chose it for his own non-political productions.