Personally, I think the underlying issue is polarisation of opinion. Polarisation produces frustration, fear, and anger. This in turn produces responses like G

Personally, I think the underlying issue is polarisation of opinion. Polarisation produces frustration, fear, and anger. This in turn produces responses like GitHub's, intended to anticipate criticism, since the criticism trends inevitably towards fury. This is true on right and left and everywhere else. It's always been the case, just look at polemics aimed at Darwinians, suffragettes, Catholics, anti-slavers, whatever. The difference today is the sheer volume, the ease with which anyone can instantly reach a global audience. And of course the cash produced from all those comments and views and clicks. It's still all bread and circuses, it's just been made ruthlessly efficient. As has been pointed out by other comments, consensus is lacking. Who's asking the people who are actually affected? And who's doing that in a calm, productive, collaborative way? I'm sure it's happening somewhere but that content is hardly going to drive traffic. Perhaps there could be a concerted, deliberate effort at helping all of us disengage from polarising media, and instead engage in meaningful conversation.