Others have said it well.
I will add that the situation has gotten far worse in the social media era for a number of reasons.
'Trolls' have become a powerful political force by easily disseminating divisive and incendiary content that would have been denied exposure under traditional media models. On average, the far right-wing has fewer moral inhibitions to relentlessly pursue power at any cost (e.g. blatant disinformation, conspiracy theories, 'alternative facts', etc.).
Social media algorithms actually promote phony or aggressive content, as its captivating nature keeps users online consuming advertisements. As more people have become desensitised to fringe content or radicalised into rabbit holes, the stances of mainstream media outlets have shifted towards the extremes of the Overton window.
People are in this modus operandi are reduced to tribalism, which represents the most primitive tendency of the human (and chimpanzee) species with a vast, if bloody, evolutionary history behind it. Our cultured and polite societies are a thin skin of civility over a primitive animal species which is easily penetrated by real or imagined existential crises.
The best advice is to try and engage with other people as humans rather than as members of a tribe. It is made challenging when everything, often including basic facts, will be a trigger for one group or another. And many people's very sense of identity is entangled into one tribe or another. Perhaps the key is developing immunity to triggers, yet sensitivity to the triggers of others.
