Actually this is an older phenomenon, pre-Trump, the Tea Party has been using certain videos to control minds, also using very aggressive tactics on the internet.
So basically what we are dealing with: on here there are perhaps also ideologues who don't believe what they type, but also people who really believe Obama is a Muslim Communist born in Kenya intent on spreading Islam and Atheistic Communism to the USA.
Not saying there aren't more moderate Trump supporters on here, but not as many are on the internet, the more moderate Trump supporters are not as much on the internet.
So it doesn't come as a surprise that the guy who punched the protester at the Trump rally said he was a terrorist; he truly believed it.
We are not dealing with a regular campaign, but with people who are so indoctrinated that it begins to resemble a religious cult more than anything else. Somewhat like Scientology, I suppose, but more dangerous. I wish I was joking...