The loudest voices are often the most algorithmically rewarded but that doesn't mean everyone feels free to speak

The quiet ones are conformists and they eventually conform to the extremists if that's all they see. Many people who think they are moderates probably aren't actually or won't be over time. There is no "radical centrism".

That's why I still think Bernie would've taken the Dems to victory in 2016. Extreme beats extreme. Hillary was just too normal.