Those who get their kicks by pretending to be idiots, etc.

It is. But nonetheless, we’re seeing it.

That doesn’t matter. For every sarcastic comment online, there will be a certain percentage of people that misses the joke and takes it seriously. Over time, these people accumulate and become a real cultural/political force.

The Trump administration is basically entirely made up of these groups. Read through this list and you’ll probably find a conspiracy theory you’ve personally made a sarcastic joke about at some point in your internet life.