I think there is a decent chance: Fox News, talk radio Limbaugh types, Rupert Murdoch media, and even the likes of CNN have all been fomenting this for ratings and $ for decades.

Fox and right radio have pushed insane junk that millions actually believe. It created the widespread tinder before social media.

Yugoslavia had neither Twitter nor Facebook, and that got much worse...

Obviously it's all conjecture, but I don't think so. Essentially all the mainstream news sites have not gone along with the claims of fraud. The only place Trump has an audience for all his nonsense is on Twitter. And Twitter marking all his tweets as misleading does nothing to deter his more extreme followers. I really hope they just ban him someday.

Human history is filled with civil wars, violent revolutions, angry protests, etc much before internet & social media.

Social media is a catalyst and internet is the mega-phone/amplifier which makes lot of things precipitate quickly than before.

If Social media and the news media were not around to radicalize and polarize Americans, this would not have happened along with many other events this year :)

The President himself is directing his followers to attack the US capitol, and HN blames Twitter and Facebook.