It's the same dynamics as elsewhere in the world, just more clearly visible due to extreme effects. Social media brings the fringe that had no platform before and unites them to the extent they are able to effect change. From policy change to outright genocide.

Traditional journalism/media always get a ton of criticism, but for all it's flaws they at least strived to have basic standards (fact checking, neutral language) and do their best try of objectivity. With the media circumvented this decade, the crazy grandpas of the world united.