The only reason you feel this perception is as you say because of social media. The US hasn't lurched suddenly to the far-right or even really the right, Trump is entirely a social media phenomenon who carries no flag or allegiance.Never forget that Abraham Lincoln once said that 87% of the statistics on the internet are made up.
It‘s not about left or right. It’s people struggling in everyday life seeking solutions and we’ve sadly succumbed to populists like Farage who offer simple, yet unworkable, solutions to complicated issues.
They‘re now starting to be found out as more and more are affected by their ineptitude, immorality and shallowness.
Social media has also changed how people perceive left and right. Anything that isn’t their view is far the opposite of their view. Some also being Chés into it, because they think it decorates their point.
Social media has also given a voice to the undereducated to have emotional reactions to things without a thought of nuance.
Whether Trump gets back in or not will probably define how the world is in a few decades.
The truth matters. That seems to have been lost for a fair while now.
If he does get in then this will come down to the simple fact that 51% of the US electorate had no other choice. The alternative to Trump is an 81 year old who is not physically or mentally able to lead a country. Why not ask the question of how the hell is Biden the only alternative to Trump in a country of 330 million people?
The only way we'll move forward as a civilisation is if we can somehow put this pointless game of politics aside and start to work together towards common goals. Until then left or right... What does it matter? The shelf life of a political party is 5 year and there's very little you can actually do in 5 years. By the time those 5 years are up the policy committees have barely decided upon a brand of tea to drink at their meetings.
Personally I believe it's time for a technocracy, the current system is not working and actually has never worked, politics is just a game for elitist fools. These political threads prove themselves that the new invention of social media coupled with politics only makes us hate each other and it's actually making us ill.